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7.2-10. Twenty-four 9th- and 10th-grade high school girls were put on an ultraheavy rope-jumping program. The fol- lowing data give the time difference in seconds for each girl ("before program time" minus "after program time") for the 40-yard dash: 0.28 0.01 0.13 0.33 -0.03 0.07 -0.18 -0.14 -0.33 0.01 0.22 0.29 -0.08 0.23 0.08 0.04 -0.30 -0.08 0.09 0.70 0.33 -0.34 0.50 0.06 (a) Give a point estimate of p, the mean of the difference in race times.

7.2-10. Twenty-four 9th- and 10th-grade high school girls were put on an ultraheavy rope-jumping program. The fol- lowing data give the time difference in seconds for each girl ("before program time" minus "after program time") for the 40-yard dash: 0.28 0.01 0.13 0.33 -0.03 0.07 -0.18 -0.14 -0.33 0.01 0.22 0.29 -0.08 0.23 0.08 0.04 -0.30 -0.08 0.09 0.70 0.33 -0.34 0.50 0.06 (a) Give a point estimate of p, the mean of the difference in race times.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 26PFA
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7.2-10. Twenty-four 9th- and 10th-grade high school girls were put on an ultraheavy rope-jumping program. The fol- lowing data give the time difference in seconds for each girl ("before program time" minus "after program time") for the 40-yard dash: 0.28 0.01 0.13 0.33 -0.03 0.07 0.18 -0.14 -0.33 0.01 0.22 0.29 -0.08 0.23 0.08 0.04 -0.30 -0.08 0.09 0.70 0.33 -0.34 0.50 0.06 (a) Give a point estimate of up, the mean of the difference in race times.
Transcribed Image Text:7.2-10. Twenty-four 9th- and 10th-grade high school girls were put on an ultraheavy rope-jumping program. The fol- lowing data give the time difference in seconds for each girl ("before program time" minus "after program time") for the 40-yard dash: 0.28 0.01 0.13 0.33 -0.03 0.07 0.18 -0.14 -0.33 0.01 0.22 0.29 -0.08 0.23 0.08 0.04 -0.30 -0.08 0.09 0.70 0.33 -0.34 0.50 0.06 (a) Give a point estimate of up, the mean of the difference in race times.
(b) Find a one-sided approximate 95% confidence inter- val that is a lower bound for #p. (c) Does it look like the rope-jumping program was effec- tive?
Transcribed Image Text:(b) Find a one-sided approximate 95% confidence inter- val that is a lower bound for #p. (c) Does it look like the rope-jumping program was effec- tive?
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