A coach has a sample of 19 students. A coach tests the abilities of his athletes by making them run laps. he has a sample size of 19 and the sample mean is 71 seconds with a standard deviation of 17 seconds. a) calculate a 99% confidence for the mean lap time. b) calculate a 95% prediction on the next lap time with the same conditions c) calculate a 90% confidence interval for the population standard deviation.
A coach has a sample of 19 students. A coach tests the abilities of his athletes by making them run laps. he has a sample size of 19 and the sample mean is 71 seconds with a standard deviation of 17 seconds. a) calculate a 99% confidence for the mean lap time. b) calculate a 95% prediction on the next lap time with the same conditions c) calculate a 90% confidence interval for the population standard deviation.
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 14PPS
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A coach has a sample of 19 students. A coach tests the abilities of his athletes by making them run laps. he has a
a) calculate a 99% confidence for the mean lap time.
b) calculate a 95% prediction on the next lap time with the same conditions
c) calculate a 90% confidence interval for the population standard deviation.
d) if the sample size is 50, what is an 85% confidence for the mean swim time?
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