Esaimen Report Edu 480
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4.0: Scoring and Grading 4.1 Answer Key 1. B The answer keyDis 2. of question paper.
16.
A
17.
D
18.
D
19.
B
20.
B
21.
D
22.
A
23.
D
24.
D
3.
D
4.
C
5.
B
6.
A
7.
D
8.
D
9.
B
10.
A
25.
C
11.
C
26.
A
12.
C
27.
C
13.
D
28.
B
14.
C
29.
C
15.
C
30.
A
a guideline for scoring the mark
4.2 GRADING A conventional way of grading the students’ marks is used for our test construction. We use letter grade to assign students’ results. Since we only have 30 questions, each question gives approximately gives 3.33 marks as the full percentage of the test marks 100%. We decide that the passing grades will be A, B, C and D while E is considered as fails.
SCORE
GRADE
80-100
A
60-79
B
40-59
C
20-39
D
0-19
E
5.0 INTREPRETING SCORE The table below shows the list of the student mark. From the table we can see the highest mark is 80 percent and the lowest are 43 percent. NO 1
GRADE A
2 3 4 5 6
B B B B B
7 8 9 10 11 12
B B B B B B
13
B
14 15 16 17 18 19 20 21
B B B B B B B B
22 23 24 25 26 27 28
B C C C C C C
STUDENTS' NAME Muhammad Akhimulah Bin Mohd Ismail Muhammad Ayraf Bin Romawor Aimi Syahirah Bt Abdul Wahid Nurhayati Bt Kamaruddin Khadijah Muhammad Muhammad Yusof Bin Mohammad Siti Aisyah Binti Zulkefli Mohammad Jushairy Affinuddin Syahira Farhana Bt Ab Aziz Siti Amirah Bt Ramli Nursafrina Bt Zambiran Muhammad Nur Adib B. Yurosolan Muhammad Affiz Shafaizal B Ibrahim Nuraini Binti Abdul Talib Nur Nabiha Bt. Mohd Yusof Muhammad Azree B. Dolmal Mohad Razin Bin Kamaluddin Nur Atiqah Razif Amira Surfeena Bt Mansur Muhammad Nur Aiman Bin Adam Ahmad Hafizu Bin Ahmad Hamzah Situ Syuairah Bt Mohd Zakhi Mohd Ali Nurul Syariena Bt Othman Fathin Naimah Bt Bahari Nur Faradilla Bt Kamaruddin Amirul Mustaqim Bin Mohammad Mohammad Alif Nasrullah Bin
MARK 24
MARK (%) 80
23 23 22 22 21
77 77 73 73 70
21 20 20 20 20 19
70 67 67 67 67 63
19
63
19 19 19 19 19 19 18 18
63 63 63 63 63 63 60 60
18 17 17 17 17 17 17
60 57 57 57 57 57 57
29 30
C C
31 32 33 34 35
C C C C C
36
C
Alias Nur Nadhirah Shamsul Sahar Siti Fatimah Az-Zahra Bt Mohd Naharudin Muhd Azizi Bin Arshad Muhammad Khoiruddin Bin Razali Ahmad Amirul Bin Nuraini Fahmi Shamsul Bahri Mohd Hisyamuddin Bin Che Othman Ahmad Aiman Bin Ghazali@Suhaimi
16 16
53 53
15 14 13 13 13
50 47 43 43 43
13
43
5.1 TABLE OF FREQUENCY
Class Interval
Frequency
41 - 45
43
46 - 50
48
51 - 55
53
56 - 60
58
61 - 65
63
66 - 70
68
71 - 80
73
81 - 90
78
5.2 HISTOGRAM
Frequency Vs Mark Range 10 9 8 7 6 Frequency
5 4 3 2 1 0
41 - 45
46 - 50
51 - 55
56 - 60 61 - 65 mark range
66 - 70
71 - 75
76 - 80
5.3 MODE & MEDIAN Mode: 19 Median: 19 5.4 MEAN Mean: 18.25 5.5 STANDARD DEVIATION Standard deviation: 1.70
ITEM 20 - Suggestion: Retain Ethanol reacts with propanoic acid to produce an ester. What is the name of the ester produced?
A
Ethyl ethanote
C
Prophyl ethanoate
B
Ethyl propanoate
D
Prophyl propanoate
A Item 20
Upper10 Lower 10
B
C
D
0
Index of
Index of
difficulty 85%
discrimination 0.3
0
1
0
0
0
0
0 7
3
0
0
Index of difficulty, P for this item is 85%. The level of difficulty for this item is low. The question is easy for the students to answer.
The index of discrimination is 0.3. This concludes that more students from upper and lower group are slightly small. 10 students from the upper and 7 students from the lower group could answer this item
correctly. The discrimination power for this item is poor. It means that this item is easy for the upper group but slightly difficult for lower group. Distracter not equally functioning. However distracter C is the best. Distracters effectiveness: A- Ineffective because none of the students choose the answer. B- Ineffective because none of the students choose the answer. C- Effective because 3 student from lower group choose the answer.
ITEMS 21 - Suggestion: Revise What is the number of oxygen atom in 0.1 mole of water? (Avagadro constant: 6.02 × 1023 mol -1) A 6.02 × 1022 B 6.02 × 1023 C 60.2 × 1023 D 3.01 x 1023
A
B
C
D
0
Index of
Index of
Item 21
Upper10
1
0
0
Lower 10
0 9
1
0
0
0
difficulty 0%
discrimination 0
0 0
Index of difficulty, P for this item is 0. The level of difficulty for this item
is very high. The question is too difficult for the students to answer. The index of discrimination is 0. This concludes that all students from up and 9 student from lower group answered the item incorrectly. The
discrimination power for this item is very poor. It means that this item is very hard for the upper group and lower
group to answer. Distracters are functioning because there is no student answer the
item correctly. Distracters effectiveness: A-Ineffective because more students from the upper grouped chooses the answer. B - Effective because 1 of the student from lower grouped chooses the answer. D – ineffective because none of the students choose the answer.
ITEM 22 - Suggestion: Retain Both ethanoic acid and nitric acid of concentration 1 mol dm-3 have iiiiiiiv-
The same concentration of hydrogen ions Different degree of ionisation in water Different pH value The same concentration of hydroxide ions
A
I and II
B
II and III
C
III and IV only
D
I and IV only
Item 22
Upper10 Lower 10
A
B
C
D
0
4 2
6 3
0 2
0 3
0 0
Index of
Index of
difficulty 30%
discrimination 0.2
Index of difficulty, P for this item is 30%. The level of difficulty for this
item is high. The question is slightly hard for the student to answer. The index of discrimination is 0.2. The discrimination power between the upper and lower is slightly small. This concludes that 4 student from the upper and only 2 student from the lower grouped answered
the item correctly. The discrimination power for this item is poor. It meant that this item is difficult the lower group to answer. Distracters are almost slightly functioning for upper and equally
functioning for the lower group. Distracters effectiveness:
B- Ineffective because more upper grouped students choose the answer. C- Effective because more lower grouped students choose the answer. D- Effective because more lower grouped students choose the answer
ITEM 23 - Suggestion: Revise Below is an Energy Profile Diagram
From the diagram above, it can be concluded that....... A
heat is required to start the reaction
B
the activation energy for the reaction is E.
C
the reaction is exothermic
D
the reactants are higher A
Item 23
Upper10 Lower 10
0 0
B
C
D
0
Index of
Index of
difficulty 0%
discrimination 0
0
1
0
0
4
0 6
0
0
The index of difficulty, P for this item is 0. The level of difficulty for this
item is very low. The question is too difficult for the students to answer. The index of discrimination is 0.This concludes that all students from upper and lower group grouped answered the item incorrectly. The
discrimination power for this item is very poor. It means that this item is very hard for the upper and lower group
students to answer because none of the student answered correctly. Distracters are functioning because there is no upper grouped student
answer the item correctly. Distracters effectiveness: A- Ineffective because none of the students choose the answer. B- Effective because more lower group choose the answer. C- Ineffective because more upper group students choose the answer.
ITEM 24 - Suggestion: Retain The Ph value of o.1mol dm-3 sodium hydroxide is higher than 0.1 mol dm-3 ammonia solution. This is because A B
sodium hydroxide is more soluble in water than ammonia the concentration of hydrogen ion in sodium hydroxide is higher
C
than concentration of hydrogen ion in ammonia solution. sodium hydroxide ionises partially in water whereas ammonia
D
ionizes completely in water the concentration of hydroxide ion in sodium hydroxide solution is higher than the concentration of hydroxide ion in ammonia solution. A
Item 24
Upper10 Lower 10
0 0
B 1 2
C 1 6
D 8 2
0 0 0
Index of
Index of
difficulty 50%
discrimination 0.6
The index of difficulty, P for this item is 50%. The level of difficulty for this item is average. The question is moderate for the students to
answer. The index of discrimination is 0.6. The discrimination power between upper and lower group is slightly big. This concludes that more students from upper group answered the items correctly. The
discrimination power for this item is good. It meant that this question is very easy for upper group but difficult for the lower group. Distracters are functioning. Distracters effectiveness: A- Ineffective because none of the student choose the answer. B- Effective because more lower group students choose the answer. C- Effective because more lower group student choose the answer.
ITEM 25 - Suggestion: Retain Which of the structural formulae are isomers of pentane?
A C
i and ii
B
i and iii
ii and iv
D
iii and iv
Item 25
A
B
C
D
0
Index of
Index of
Upper10
0
0
1
0
0
difficulty 80%
discrimination 0.4
Lower 10
0
4
0 6
0
0
The index of difficulty, P for this item is 80%. The level of difficulty for
this item is low. The question is easy for the students to answer. The index of discrimination is 0.4. The discrimination power between the upper and lower grouped is slightly big. This concludes that more student from the upper grouped answered the items correctly. The
discrimination power for this item is reasonable. It meant that this question is easy for upper group student to answer
but difficult for lower group student. The distracter for answer B is very functioning. Distracters effectiveness: A- Ineffective because none of the students choose the answer. B- Effective because more lower group students choose the answer. D - Ineffective because none of the student choose the answer.
ITEM 26 Suggestion: Retain
The table shows four different types of esters produced by reaction certain alcohol with different carboxylic acids.
Which pair of ester has the same molecular formula? A B
P and R R and S
C
P and Q
D
Q and S
A Item 26
Upper10 Lower 10
9 2
B 0 6
C 1 2
D 0 0
0 0 0
Index of
Index of
difficulty 55%
discrimination 0.7
The index of difficulty, P for this item is 55%. The level of difficulty for this item is average. The question is moderate for the student to
answer. The index of discrimination is 0.7. The discrimination power between upper and lower grouped is big. This concludes that more students from upper group answered the item correctly. The discrimination
power for this item is good. It meant that the question is very easy for the upper grouped student. Distracters are not equally functioning. Distracters effectiveness:
B- Effective because more lower groups students choose the answer. C- Effective because more lower groups students choose the answer. D- Ineffective because none of the students choose the answer.
ITEM 27 - Suggestion: Retain
Magnesium ribbon, tin foil, copper foil, and zinc foil are coiled around different nails. The metal pairs are then placed in a test tube containing aqueous sodium chloride solution. Which of the test tubes will contain the higher concentration of iron (II) ions after two days?
A C
W Y
B D A
Item 27
Upper10 Lower 10
0 4
B
C
D
X Z 0
Index of
Index of
difficulty 70%
discrimination 0.6
0
1
0
0
0
0 4
2
0
The index of difficulty, P for this item is 70%. The level of difficulty for
this item is low. The question is easy for the students to answer. The index of discrimination is 0.6. The discrimination power between upper and lower grouped is big. This concludes that more students from upper group answered the item correctly. The discrimination
power for this item is good. It meant that the question is very easy for the upper grouped student. Distracters are not equally functioning.
Distracters effectiveness:
A- Effective because more lower group students chooses the answer. B- Ineffective because none of the student chooses the answer. D – Effective because more lower group student chooses the answer.
ITEM 28 - Suggestion: Revise When a mixture of carbon and copper (II) oxide is heated strongly iiiiiiiv-
The The The The
oxide ion loses two electrons oxidation number of carbon increases from 0 to +4 copper( II) oxide acts as the reducing agent copper(II) ion accept two electrons
A i and iii B ii and iv C ii, iii and iv D i, ii, iii, and iv A Item 28
Upper10 Lower 10
4 1
B 5 7
C 1 0
D 0 2
0 0 0
Index of
Index of
difficulty 60%
discrimination -0.2
The index of difficulty, P for this item is 60%. The level of difficulty for this item is average. The question is moderate for the students to
answer. The index discrimination is -0.2. The discrimination power between upper and lower group is smaller. This concludes that more students from lower group answered the item correctly. The discrimination power for this item is poor.
It meant that this question is contradicted because more students from
lower group answered the question correctly. Distracters are equally functioning. Distracters effectiveness: A- Ineffective because more upper group students choose the answer. C – Ineffective because more upper group students choose the answer. D – Effective because more lower group students chooses the answer.
ITEM 29 – Suggestion: Revise The diagram shows the set up apparatus of a simple chemical cell.
What are metals X and Y that produced the highest voltage cell? Metal X Metal Y A Aluminium Iron B Silver Magnesium C Magnesium Copper D Zinc Lead
A Item 29
Upper10
0
B 1
C 0
D 0
0
Index of
Index of
0
difficulty 35%
discrimination -0.7
Lower 10
0
0 3
7
0
0
The index of difficulty is 35%. The level of difficulty is average. The
question is moderate for the students to answer. The index of discrimination is -0.7. The different between upper and lower group students is smallest. This concludes that more students from lower group answered the item correctly. The discrimination
power for this item is very poor. It meant that this question is contradicted because more students from
lower group answered the question correctly. Distracters are not equally functioning. Distracters effectiveness: A- Ineffective because none of the student chooses the answer. B- Ineffective because more upper group students chooses the answer. D - Ineffective because none of the student chooses the answer.
ITEM 30 - Suggestion: Revise An iron spoon is electroplated. The apparatus used is shown in the diagram.
Copper rod
At the end of the electrolysis, it is observed that....
A Item 30
Upper10 Lower 10
B
C
D
0
Index of
Index of
difficulty 0%
discrimination 0
0
1
0
0
0
0
0 9
0
1
0
The index of difficulty, P for this item is 0. The level of difficulty for this item is very low. The question is too difficult for the students to answer.
The index of discrimination is 0.This concludes that all students from upper and lower group grouped answered the item incorrectly. The
discrimination power for this item is very poor. It means that this item is very hard for the upper and lower group
students to answer. Distracters B are very functioning because 10 students from upper and 9 students from lower grouped student chooses to answer the question.
Distracters effectiveness: B- Ineffective because more upper group students choose the answer. C - Ineffective because none of the students choose the answer. D – Effective because more lower group student choose the answer.
16.
A
17.
D
18.
D
19.
B
20.
B
21.
D
22.
A
23.
D
24.
D
3.
D
4.
C
5.
B
6.
A
7.
D
8.
D
9.
B
10.
A
25.
C
11.
C
26.
A
12.
C
27.
C
13.
D
28.
B
14.
C
29.
C
15.
C
30.
A
a guideline for scoring the mark
4.2 GRADING A conventional way of grading the students’ marks is used for our test construction. We use letter grade to assign students’ results. Since we only have 30 questions, each question gives approximately gives 3.33 marks as the full percentage of the test marks 100%. We decide that the passing grades will be A, B, C and D while E is considered as fails.
SCORE
GRADE
80-100
A
60-79
B
40-59
C
20-39
D
0-19
E
5.0 INTREPRETING SCORE The table below shows the list of the student mark. From the table we can see the highest mark is 80 percent and the lowest are 43 percent. NO 1
GRADE A
2 3 4 5 6
B B B B B
7 8 9 10 11 12
B B B B B B
13
B
14 15 16 17 18 19 20 21
B B B B B B B B
22 23 24 25 26 27 28
B C C C C C C
STUDENTS' NAME Muhammad Akhimulah Bin Mohd Ismail Muhammad Ayraf Bin Romawor Aimi Syahirah Bt Abdul Wahid Nurhayati Bt Kamaruddin Khadijah Muhammad Muhammad Yusof Bin Mohammad Siti Aisyah Binti Zulkefli Mohammad Jushairy Affinuddin Syahira Farhana Bt Ab Aziz Siti Amirah Bt Ramli Nursafrina Bt Zambiran Muhammad Nur Adib B. Yurosolan Muhammad Affiz Shafaizal B Ibrahim Nuraini Binti Abdul Talib Nur Nabiha Bt. Mohd Yusof Muhammad Azree B. Dolmal Mohad Razin Bin Kamaluddin Nur Atiqah Razif Amira Surfeena Bt Mansur Muhammad Nur Aiman Bin Adam Ahmad Hafizu Bin Ahmad Hamzah Situ Syuairah Bt Mohd Zakhi Mohd Ali Nurul Syariena Bt Othman Fathin Naimah Bt Bahari Nur Faradilla Bt Kamaruddin Amirul Mustaqim Bin Mohammad Mohammad Alif Nasrullah Bin
MARK 24
MARK (%) 80
23 23 22 22 21
77 77 73 73 70
21 20 20 20 20 19
70 67 67 67 67 63
19
63
19 19 19 19 19 19 18 18
63 63 63 63 63 63 60 60
18 17 17 17 17 17 17
60 57 57 57 57 57 57
29 30
C C
31 32 33 34 35
C C C C C
36
C
Alias Nur Nadhirah Shamsul Sahar Siti Fatimah Az-Zahra Bt Mohd Naharudin Muhd Azizi Bin Arshad Muhammad Khoiruddin Bin Razali Ahmad Amirul Bin Nuraini Fahmi Shamsul Bahri Mohd Hisyamuddin Bin Che Othman Ahmad Aiman Bin Ghazali@Suhaimi
16 16
53 53
15 14 13 13 13
50 47 43 43 43
13
43
5.1 TABLE OF FREQUENCY
Class Interval
Frequency
41 - 45
43
46 - 50
48
51 - 55
53
56 - 60
58
61 - 65
63
66 - 70
68
71 - 80
73
81 - 90
78
5.2 HISTOGRAM
Frequency Vs Mark Range 10 9 8 7 6 Frequency
5 4 3 2 1 0
41 - 45
46 - 50
51 - 55
56 - 60 61 - 65 mark range
66 - 70
71 - 75
76 - 80
5.3 MODE & MEDIAN Mode: 19 Median: 19 5.4 MEAN Mean: 18.25 5.5 STANDARD DEVIATION Standard deviation: 1.70
ITEM 20 - Suggestion: Retain Ethanol reacts with propanoic acid to produce an ester. What is the name of the ester produced?
A
Ethyl ethanote
C
Prophyl ethanoate
B
Ethyl propanoate
D
Prophyl propanoate
A Item 20
Upper10 Lower 10
B
C
D
0
Index of
Index of
difficulty 85%
discrimination 0.3
0
1
0
0
0
0
0 7
3
0
0
Index of difficulty, P for this item is 85%. The level of difficulty for this item is low. The question is easy for the students to answer.
The index of discrimination is 0.3. This concludes that more students from upper and lower group are slightly small. 10 students from the upper and 7 students from the lower group could answer this item
correctly. The discrimination power for this item is poor. It means that this item is easy for the upper group but slightly difficult for lower group. Distracter not equally functioning. However distracter C is the best. Distracters effectiveness: A- Ineffective because none of the students choose the answer. B- Ineffective because none of the students choose the answer. C- Effective because 3 student from lower group choose the answer.
ITEMS 21 - Suggestion: Revise What is the number of oxygen atom in 0.1 mole of water? (Avagadro constant: 6.02 × 1023 mol -1) A 6.02 × 1022 B 6.02 × 1023 C 60.2 × 1023 D 3.01 x 1023
A
B
C
D
0
Index of
Index of
Item 21
Upper10
1
0
0
Lower 10
0 9
1
0
0
0
difficulty 0%
discrimination 0
0 0
Index of difficulty, P for this item is 0. The level of difficulty for this item
is very high. The question is too difficult for the students to answer. The index of discrimination is 0. This concludes that all students from up and 9 student from lower group answered the item incorrectly. The
discrimination power for this item is very poor. It means that this item is very hard for the upper group and lower
group to answer. Distracters are functioning because there is no student answer the
item correctly. Distracters effectiveness: A-Ineffective because more students from the upper grouped chooses the answer. B - Effective because 1 of the student from lower grouped chooses the answer. D – ineffective because none of the students choose the answer.
ITEM 22 - Suggestion: Retain Both ethanoic acid and nitric acid of concentration 1 mol dm-3 have iiiiiiiv-
The same concentration of hydrogen ions Different degree of ionisation in water Different pH value The same concentration of hydroxide ions
A
I and II
B
II and III
C
III and IV only
D
I and IV only
Item 22
Upper10 Lower 10
A
B
C
D
0
4 2
6 3
0 2
0 3
0 0
Index of
Index of
difficulty 30%
discrimination 0.2
Index of difficulty, P for this item is 30%. The level of difficulty for this
item is high. The question is slightly hard for the student to answer. The index of discrimination is 0.2. The discrimination power between the upper and lower is slightly small. This concludes that 4 student from the upper and only 2 student from the lower grouped answered
the item correctly. The discrimination power for this item is poor. It meant that this item is difficult the lower group to answer. Distracters are almost slightly functioning for upper and equally
functioning for the lower group. Distracters effectiveness:
B- Ineffective because more upper grouped students choose the answer. C- Effective because more lower grouped students choose the answer. D- Effective because more lower grouped students choose the answer
ITEM 23 - Suggestion: Revise Below is an Energy Profile Diagram
From the diagram above, it can be concluded that....... A
heat is required to start the reaction
B
the activation energy for the reaction is E.
C
the reaction is exothermic
D
the reactants are higher A
Item 23
Upper10 Lower 10
0 0
B
C
D
0
Index of
Index of
difficulty 0%
discrimination 0
0
1
0
0
4
0 6
0
0
The index of difficulty, P for this item is 0. The level of difficulty for this
item is very low. The question is too difficult for the students to answer. The index of discrimination is 0.This concludes that all students from upper and lower group grouped answered the item incorrectly. The
discrimination power for this item is very poor. It means that this item is very hard for the upper and lower group
students to answer because none of the student answered correctly. Distracters are functioning because there is no upper grouped student
answer the item correctly. Distracters effectiveness: A- Ineffective because none of the students choose the answer. B- Effective because more lower group choose the answer. C- Ineffective because more upper group students choose the answer.
ITEM 24 - Suggestion: Retain The Ph value of o.1mol dm-3 sodium hydroxide is higher than 0.1 mol dm-3 ammonia solution. This is because A B
sodium hydroxide is more soluble in water than ammonia the concentration of hydrogen ion in sodium hydroxide is higher
C
than concentration of hydrogen ion in ammonia solution. sodium hydroxide ionises partially in water whereas ammonia
D
ionizes completely in water the concentration of hydroxide ion in sodium hydroxide solution is higher than the concentration of hydroxide ion in ammonia solution. A
Item 24
Upper10 Lower 10
0 0
B 1 2
C 1 6
D 8 2
0 0 0
Index of
Index of
difficulty 50%
discrimination 0.6
The index of difficulty, P for this item is 50%. The level of difficulty for this item is average. The question is moderate for the students to
answer. The index of discrimination is 0.6. The discrimination power between upper and lower group is slightly big. This concludes that more students from upper group answered the items correctly. The
discrimination power for this item is good. It meant that this question is very easy for upper group but difficult for the lower group. Distracters are functioning. Distracters effectiveness: A- Ineffective because none of the student choose the answer. B- Effective because more lower group students choose the answer. C- Effective because more lower group student choose the answer.
ITEM 25 - Suggestion: Retain Which of the structural formulae are isomers of pentane?
A C
i and ii
B
i and iii
ii and iv
D
iii and iv
Item 25
A
B
C
D
0
Index of
Index of
Upper10
0
0
1
0
0
difficulty 80%
discrimination 0.4
Lower 10
0
4
0 6
0
0
The index of difficulty, P for this item is 80%. The level of difficulty for
this item is low. The question is easy for the students to answer. The index of discrimination is 0.4. The discrimination power between the upper and lower grouped is slightly big. This concludes that more student from the upper grouped answered the items correctly. The
discrimination power for this item is reasonable. It meant that this question is easy for upper group student to answer
but difficult for lower group student. The distracter for answer B is very functioning. Distracters effectiveness: A- Ineffective because none of the students choose the answer. B- Effective because more lower group students choose the answer. D - Ineffective because none of the student choose the answer.
ITEM 26 Suggestion: Retain
The table shows four different types of esters produced by reaction certain alcohol with different carboxylic acids.
Which pair of ester has the same molecular formula? A B
P and R R and S
C
P and Q
D
Q and S
A Item 26
Upper10 Lower 10
9 2
B 0 6
C 1 2
D 0 0
0 0 0
Index of
Index of
difficulty 55%
discrimination 0.7
The index of difficulty, P for this item is 55%. The level of difficulty for this item is average. The question is moderate for the student to
answer. The index of discrimination is 0.7. The discrimination power between upper and lower grouped is big. This concludes that more students from upper group answered the item correctly. The discrimination
power for this item is good. It meant that the question is very easy for the upper grouped student. Distracters are not equally functioning. Distracters effectiveness:
B- Effective because more lower groups students choose the answer. C- Effective because more lower groups students choose the answer. D- Ineffective because none of the students choose the answer.
ITEM 27 - Suggestion: Retain
Magnesium ribbon, tin foil, copper foil, and zinc foil are coiled around different nails. The metal pairs are then placed in a test tube containing aqueous sodium chloride solution. Which of the test tubes will contain the higher concentration of iron (II) ions after two days?
A C
W Y
B D A
Item 27
Upper10 Lower 10
0 4
B
C
D
X Z 0
Index of
Index of
difficulty 70%
discrimination 0.6
0
1
0
0
0
0 4
2
0
The index of difficulty, P for this item is 70%. The level of difficulty for
this item is low. The question is easy for the students to answer. The index of discrimination is 0.6. The discrimination power between upper and lower grouped is big. This concludes that more students from upper group answered the item correctly. The discrimination
power for this item is good. It meant that the question is very easy for the upper grouped student. Distracters are not equally functioning.
Distracters effectiveness:
A- Effective because more lower group students chooses the answer. B- Ineffective because none of the student chooses the answer. D – Effective because more lower group student chooses the answer.
ITEM 28 - Suggestion: Revise When a mixture of carbon and copper (II) oxide is heated strongly iiiiiiiv-
The The The The
oxide ion loses two electrons oxidation number of carbon increases from 0 to +4 copper( II) oxide acts as the reducing agent copper(II) ion accept two electrons
A i and iii B ii and iv C ii, iii and iv D i, ii, iii, and iv A Item 28
Upper10 Lower 10
4 1
B 5 7
C 1 0
D 0 2
0 0 0
Index of
Index of
difficulty 60%
discrimination -0.2
The index of difficulty, P for this item is 60%. The level of difficulty for this item is average. The question is moderate for the students to
answer. The index discrimination is -0.2. The discrimination power between upper and lower group is smaller. This concludes that more students from lower group answered the item correctly. The discrimination power for this item is poor.
It meant that this question is contradicted because more students from
lower group answered the question correctly. Distracters are equally functioning. Distracters effectiveness: A- Ineffective because more upper group students choose the answer. C – Ineffective because more upper group students choose the answer. D – Effective because more lower group students chooses the answer.
ITEM 29 – Suggestion: Revise The diagram shows the set up apparatus of a simple chemical cell.
What are metals X and Y that produced the highest voltage cell? Metal X Metal Y A Aluminium Iron B Silver Magnesium C Magnesium Copper D Zinc Lead
A Item 29
Upper10
0
B 1
C 0
D 0
0
Index of
Index of
0
difficulty 35%
discrimination -0.7
Lower 10
0
0 3
7
0
0
The index of difficulty is 35%. The level of difficulty is average. The
question is moderate for the students to answer. The index of discrimination is -0.7. The different between upper and lower group students is smallest. This concludes that more students from lower group answered the item correctly. The discrimination
power for this item is very poor. It meant that this question is contradicted because more students from
lower group answered the question correctly. Distracters are not equally functioning. Distracters effectiveness: A- Ineffective because none of the student chooses the answer. B- Ineffective because more upper group students chooses the answer. D - Ineffective because none of the student chooses the answer.
ITEM 30 - Suggestion: Revise An iron spoon is electroplated. The apparatus used is shown in the diagram.
Copper rod
At the end of the electrolysis, it is observed that....
A Item 30
Upper10 Lower 10
B
C
D
0
Index of
Index of
difficulty 0%
discrimination 0
0
1
0
0
0
0
0 9
0
1
0
The index of difficulty, P for this item is 0. The level of difficulty for this item is very low. The question is too difficult for the students to answer.
The index of discrimination is 0.This concludes that all students from upper and lower group grouped answered the item incorrectly. The
discrimination power for this item is very poor. It means that this item is very hard for the upper and lower group
students to answer. Distracters B are very functioning because 10 students from upper and 9 students from lower grouped student chooses to answer the question.
Distracters effectiveness: B- Ineffective because more upper group students choose the answer. C - Ineffective because none of the students choose the answer. D – Effective because more lower group student choose the answer.
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