Complete the following questions:

I. 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 0â€“4, and the last 40â€“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. (_____)_
0-4       9. (_____)_

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II. 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)
Mx= (_____)
Mean of Test 2 (Y)
My= (____)
Summation of squared deviations scores for Test 1
Î£x2= (______)
Summation of squared deviations scores for Test 2
Î£y2 = (______)
Summation of the product of deviation scores for Test 1 and Test 2
Î£xy = (______)

Correlation Coefficient:
r = (_____)

III. 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:
Mean= (______)
Median = (______)
Mode = (______)
SD =    (______)

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

IV. 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

What is the z-score for History? (_______)
What is the z-score for English? (_______)
What is the T-score for History? (_______)
What is the T-score for English? (_______)

V. Use the following data to answer the following questions (*indicates the correct answer).
ITEM 1: A B C D*
UPPER: 2 4 2 4
LOWER: 6 1 3 2

ITEM 2: A B C* D
UPPER: 0 5 5 5
LOWER: 0 3 11 1
Circle the letter of the correct answer.

What is the difficulty level of item 1?
What is the difficulty level of item 2?
a. 4/12 a. 5/15
b. 6/12 b. 6/15
c. 2/24 c. 5/30
d. 4/24 d. 6/30
e. 6/24 e. 16/30

What is the discrimination index of item 1?
What is item 2â€™s discrimination index?
a. 2/12 a. 6/15
b. 6/12 b. 4/15
c. 2/24 c. -6/15
d. 6/24 d. -6/30
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Which distractor on Item 1 needs revision or elimination?
a. 1-A
b. 1-B
c. 1-C
d. None of these

Which of the following is indicated by Item 2?
a. Ambiguous
b. Guessing
c. Miskeyed
d. Too difficult

The majority of Mr. Smithâ€™s students made very high scores on this test. The curve of the distribution of scores on this test would most likely be
a. normal
b. symmetrical
c. positively skewed
d. negatively skewed

Which of the following râ€™s have the least predictive value?
a. 0.91
b. 0.50
c. 0.17
d. 0.23
e. -1.00

The reliability procedure that involves correlation of partial scores from one administration of one test is
a. test-retest
b. parallel forms
c. split half
d. none of the above

Total: _____ x 3+1 =_______/100

Complete the following questions: I. Frequency Distributions Th...