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A recent report for a regional airline reported that the mean number of hours of flying time for its pilots is 65 hours per month. This mean was based on actual flying times for a sample of 55 pilots and the sample standard deviation was 7 hours. 2. Calculate a 95% confidence interval estimate of the population mean flying time for the pilots. Round your result to 4 decimal places. ( 63.108 66.892 3. Using the information given, what is the smallest sample size necessary to estimate the mean flying time with a margin of error of 1.75 hour and 95% confidence? Note: For consistency's sake, round your t* value to 3 decimal places before calculating the necessary sample size. Choose n =

A recent report for a regional airline reported that the mean number of hours of flying time for its pilots is 65 hours per month. This mean was based on actual flying times for a sample of 55 pilots and the sample standard deviation was 7 hours. 2. Calculate a 95% confidence interval estimate of the population mean flying time for the pilots. Round your result to 4 decimal places. ( 63.108 66.892 3. Using the information given, what is the smallest sample size necessary to estimate the mean flying time with a margin of error of 1.75 hour and 95% confidence? Note: For consistency's sake, round your t* value to 3 decimal places before calculating the necessary sample size. Choose n =

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
Section10.4: Distributions Of Data
Problem 19PFA
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A recent report for a regional airline reported that the mean number of hours of flying time for its pilots is 65 hours per month. This mean was based on actual flying times for a sample of 55 pilots and the sample standard deviation was 7 hours. 2. Calculate a 95% confidence interval estimate of the population mean flying time for the pilots. Round your result to 4 decimal places. ( 63.108 66.892 3. Using the information given, what is the smallest sample size necessary to estimate the mean flying time with a margin of error of 1.75 hour and 95% confidence? Note: For consistency's sake, round your t* value to 3 decimal places before calculating the necessary sample size. Choose n =
Transcribed Image Text:A recent report for a regional airline reported that the mean number of hours of flying time for its pilots is 65 hours per month. This mean was based on actual flying times for a sample of 55 pilots and the sample standard deviation was 7 hours. 2. Calculate a 95% confidence interval estimate of the population mean flying time for the pilots. Round your result to 4 decimal places. ( 63.108 66.892 3. Using the information given, what is the smallest sample size necessary to estimate the mean flying time with a margin of error of 1.75 hour and 95% confidence? Note: For consistency's sake, round your t* value to 3 decimal places before calculating the necessary sample size. Choose n =
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