1. What is the total number of scores for the distribution shown in the following table?
X f
4 3
3 5
2 4
1 2
A. 4
B. 10
C. 14
D. 37
2. A sample of n = 15 scores ranges from a high of X = 11 to a low of X = 3. If these scores are placed in a
frequency distribution table, how many X values will be listed in the first column?
A. 8
B. 9
C. 11
D. 15
3. For the following frequency distribution of quiz scores, how many individuals took the quiz?
X f
5 6
4 5
3 5
2 3
1 2
A. n = 5
B. n = 15
C. n = 21
D. cannot be determined
,4. For the following distribution of quiz scores, if a score of X = 3 or higher is needed for a passing grade, how
many individuals passed?
X f
5 6
4 5
3 5
2 3
1 2
A. 3
B. 11
C. 16
D. cannot be determined
5. For the following distribution of quiz scores, How many individuals had a score of X = 2?
X f
5 6
4 5
3 5
2 3
1 2
A. 1
B. 3
C. 5
D. cannot be determined
6. For the following frequency distribution of exam scores, what is the lowest score on the exam?
X f
90-94 3
85-89 4
80-84 5
75-79 2
70-74 1
A. x = 70
B. x = 74
C. x = 90
D. cannot be determined
, 7. For the following frequency distribution of exam scores, how many students had scores lower than X = 80?
X f
90-94 3
85-89 4
80-84 5
75-79 2
70-74 1
A. 2
B. 3
C. 7
D. cannot be determined
8. In a grouped frequency distribution one interval is listed as 50-59. Assuming that the scores are measuring a
continuous variable, what are the real limits of this interval?
A. 50 and 59
B. 50.5 and 59.5
C. 49.5 and 59.5
D. 49.5 and 60.5
9. For the following distribution, how many people had scores less than X = 19?
X f
20-25 2
15-19 5
10-14 4
5-9 1
A. 5
B. 10
C. 11
D. cannot be determined
10. For the following distribution, what is the highest score?
X f
20-25 2
15-19 5
10-14 4
5-9 1
A. 5
B. 20
C. 25
D. cannot be determined
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