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

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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. 25^th Â Â 2Â Â Â b. 50^th Â Â 3Â Â Â c. 55^thÂ Â 3Â Â Â d. 75^thÂ Â 4e.80^th Â Â 4 Â Â Â f. 99^thÂ Â Â 5 Â Â Â
2. What is the interquartile range of the data in #1?
3. Compute the exact percentile ranks that correspondto the following scores:
a. 2Â Â Â Â Â Â b. 3Â Â Â Â Â Â c.4Â Â Â Â Â Â d. 1Â Â Â

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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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%