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(a) Calculate and interpret a 95% confidence interval for population mean cadence. (Ro

(a) Calculate and interpret a 95% confidence interval for population mean cadence. (Ro

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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A study of the ability of individuals to walk in a straight line reported the accompanying data on cadence (strides per second) for a sample of n = 20 randomly selected healthy men. 0.93 0.85 0.92 0.95 0.93 0.87 1.00 0.92 0.85 0.81 0.79 0.93 0.93 1.05 0.93 1.06 1.06 0.96 0.81 0.99 A normal probability plot gives substantial support to the assumption that the population distribution of cadence is approximately normal. A descriptive summary of the data from Minitab follows. Variable N Mean Median TrMean StDev SEMean cadence 20 0.9270 0.9300 0.9272 0.0804 0.0180 Variable Min Мах Q1 Q3 cadence 0.7900 1.0600 0.8600 0.9750 (a) Calculate and interpret a 95% confidence interval for population mean cadence. (Round your answers to four decimal places.) strides per second Interpret this interval. O with 95% confidence, the value of the true mean cadence of all such men falls below the confidence interval. O with 95% confidence, the value of the true mean cadence of all such men falls above the confidence interval. O with 95% confidence, the value of the true mean cadence of all such men falls inside the confidence interval.
Transcribed Image Text:A study of the ability of individuals to walk in a straight line reported the accompanying data on cadence (strides per second) for a sample of n = 20 randomly selected healthy men. 0.93 0.85 0.92 0.95 0.93 0.87 1.00 0.92 0.85 0.81 0.79 0.93 0.93 1.05 0.93 1.06 1.06 0.96 0.81 0.99 A normal probability plot gives substantial support to the assumption that the population distribution of cadence is approximately normal. A descriptive summary of the data from Minitab follows. Variable N Mean Median TrMean StDev SEMean cadence 20 0.9270 0.9300 0.9272 0.0804 0.0180 Variable Min Мах Q1 Q3 cadence 0.7900 1.0600 0.8600 0.9750 (a) Calculate and interpret a 95% confidence interval for population mean cadence. (Round your answers to four decimal places.) strides per second Interpret this interval. O with 95% confidence, the value of the true mean cadence of all such men falls below the confidence interval. O with 95% confidence, the value of the true mean cadence of all such men falls above the confidence interval. O with 95% confidence, the value of the true mean cadence of all such men falls inside the confidence interval.
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