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Twenty-four 9th- and 10th-grade high school girls were put on an ultraheavy rope-jumping
Chapter 7, Problem 7.2-10(choose chapter or problem)
Twenty-four 9th- and 10th-grade high school girls were put on an ultraheavy rope-jumping program. The following data give the time difference 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 D, the mean of the difference in race times. (b) Find a one-sided 95% confidence interval that is a lower bound for D. (c) Does it look like the rope-jumping program was effective?
Questions & Answers
QUESTION:
Twenty-four 9th- and 10th-grade high school girls were put on an ultraheavy rope-jumping program. The following data give the time difference 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 D, the mean of the difference in race times. (b) Find a one-sided 95% confidence interval that is a lower bound for D. (c) Does it look like the rope-jumping program was effective?
ANSWER:Step 1 of 7
The point estimate for
