# Computational Exam- Test and Measurment

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Computational Exam

Complete the following questions and submit the final version of the document through the appropriate submission link:

1. Frequency Distributions

The following are 50 scores on a History examination.

37        39        42        30        38        20        17        16        15        6

25        22        15        25        31        18        21        13        5          11

27        26        26        22        31        15        16        22        17        6

22        27        27        32        17        32        14        12        23        18

28        29        33        28        19        19        34        20        21        29

From these scores, construct a frequency distribution table.

Use nine classes, with the first class 0–4, and the last 40–44

Class Interval                         tally                             frequency

40-44                                                                           1. (_____)_

35-39                                                                           2. (_____)_

30-34                                                                           3. (_____)_

25-29                                                                           4. (_____)_

20-24                                                                           5. (_____)_

15-19                                                                           6. (_____)_

10-14                                                                           7. (_____)_

5-9                                                                             8. (_____)_

• ___ (_____)_

1. From the following scores on two tests, calculate the following values:

Test 1 (X): 29, 28, 25, 25, 22, 22, 21, 20, 19, 19

Test 2 (Y): 34, 31, 35, 30, 31, 28, 28, 25, 24, 24

Mean of Test 1 (X)

1. Mx= (_____)

Mean of Test 2 (Y)

1. My= (____)
2. Summation of squared deviations scores for Test 1

Σx2= (______)

Summation of squared deviations scores for Test 2

1. Σy2 = (______)

Summation of the product of deviation scores for Test 1 and Test 2

1. Σxy = (______)

Correlation Coefficient:

1. r = (_____)
• Twenty students received the following scores on a short quiz:

23, 20, 20, 19, 19, 19, 18, 18, 18, 18,

17, 17, 17, 15, 14, 13, 13, 12, 12, 18.

Calculate the following:

1. Mean=   (______)
2. Median=(______)
3. Mode= (______)
4. SD =       (______)

1. If this small sample is normally distributed, 68% of the scores should fall between what two values? ______________and___________________.

1. A student takes examinations in a History course and an English course.

The following information is taken from the two tests:

History                                  English

Student Score                                           64                                         80

Mean                                                        54                                         70

SD                                                             4                                         10

1. What is the z-score for History? (_______)
2. What is the z-score for English? (_______)
3. What is the T-score for History? (_______)
4. What is the T-score for English? (_______)
5. Use the following data to answer questions 25 – 30. (*indicates the correct answer).

ITEM 1          A        B       C       D*                  ITEM 2          A            B     C*       D

UPPER          2          4          2          4                      UPPER           0            5      5          5

LOWER         6          1          3          2                      LOWER         0             3       11        1

Circle the letter of the correct answer.

1. What is the difficulty level of item 1?         26. What is the difficulty level of item 2?
2. 4/12 5/15
3. 6/12 6/15
4. 2/24                         5/30
5. 4/24                         6/30
6. 6/24            16/30
7. What is the discrimination index of item 1? 28. What is item 2’s discrimination index?
8. 2/12 a. 6/15
9. 6/12 b. 4/15
10. 2/24 c. -6/15
11. 6/24 d. -6/30

1. Which distractor on Item 1 needs revision or elimination?
2. 1-A
3. 1-B
4. 1-C
5. None of these
6. Which of the following is indicated by Item 2?
7. Ambiguous
8. Guessing
9. Miskeyed
10. Too difficult
11. The majority of Mr. Smith’s students made very high scores on this test. The curve of the distribution of scores on this test would most likely be
12. normal
13. symmetrical
14. positively skewed
15. negatively skewed
16. Which of the following r’s have the least predictive value?
17. 0.91
18. 0.50
19. 0.17
20. 0.23
21. -1.00
22. The reliability procedure that involves correlation of partial scores from one administration of one test is
23. test-retest
24. parallel forms
25. split half
26. none of the above

Total: _____ x 3+1 =_______/100

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