Posted: September 13th, 2017
Computational Exam- Test and Measurment
Paper, Order, or Assignment Requirements
Computational Exam
Complete the following questions and submit the final version of the document through the appropriate submission link:
- 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. (_____)_
- 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
Σx2= (______)
Summation of squared deviations scores for Test 2
- Σy2 = (______)
Summation of the product of deviation scores for Test 1 and Test 2
- Σxy = (______)
Correlation Coefficient:
- 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:
- Mean= (______)
- Median=(______)
- Mode= (______)
- SD = (______)
- If this small sample is normally distributed, 68% of the scores should fall between what two values? ______________and___________________.
- 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? (_______)
- 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.
- What is the difficulty level of item 1? 26. What is the difficulty level of item 2?
- 4/12 5/15
- 6/12 6/15
- 2/24 5/30
- 4/24 6/30
- 6/24 16/30
- What is the discrimination index of item 1? 28. What is item 2’s discrimination index?
- 2/12 a. 6/15
- 6/12 b. 4/15
- 2/24 c. -6/15
- 6/24 d. -6/30
- Which distractor on Item 1 needs revision or elimination?
- 1-A
- 1-B
- 1-C
- None of these
- Which of the following is indicated by Item 2?
- Ambiguous
- Guessing
- Miskeyed
- Too difficult
- 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
- normal
- symmetrical
- positively skewed
- negatively skewed
- Which of the following r’s have the least predictive value?
- 0.91
- 0.50
- 0.17
- 0.23
- -1.00
- The reliability procedure that involves correlation of partial scores from one administration of one test is
- test-retest
- parallel forms
- split half
- none of the above
Total: _____ x 3+1 =_______/100