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A statistics professor gave a 5-point quiz to the 50 students in his class. Scores on...

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Question

Basic Math

A statistics professor gave a 5-point quiz to the 50 students inhis class. Scores on the quiz could range from 0 to 5: Thefollowing frequency table resulted: (1.5 points)

Quiz Score

f

rf

cf

crf

c%

5

4

.08

50

1.00

100%

4

10

.20

46

.96

96%

3

14

.28

36

.72

72%

2

10

.20

22

.44

44%

1

8

.16

12

.24

24%

0

4

.08

4

.08

8%

1. Compute the values that define the followingpercentiles:

a. 25th   2    b. 50th   3    c. 55th  3    d. 75th   4e.80th   4     f. 99th   5    

2. What is the interquartile range of the data in #1?

3. Compute the exact percentile ranks that correspondto the following scores:

a. 2       b. 3        c.4        d. 1   

Answer & Explanation Solved by verified expert
3.7 Ratings (339 Votes)
25th percentile is the first score where the cumulatedpercentage exceeds 25Here it is 2 c of score 2 44If the students are ranked by Quiz score the last student with ascore of 1 is ranked 12 c 24 and the last    See Answer
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