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(1 point) A recent report for a regional airline reported that the mean number of hours...

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Basic Math

(1 point) A recent report for a regional airline reported thatthe mean number of hours of flying time for its pilots is 66 hoursper month. This mean was based on actual flying times for a sampleof 49 pilots and the sample standard deviation was 8.5 hours.

2. Calculate a 99% confidence interval estimate of thepopulation mean flying time for the pilots. Round your result to 4decimal places.

( ,  )

3.Using the information given, what is the smallest sample sizenecessary to estimate the mean flying time with a margin of errorof 1 hour and 99% confidence? Note: For consistency's sake, roundyour t* value to 3 decimal places before calculating the necessarysample size.

Choose n =

Answer & Explanation Solved by verified expert
4.4 Ratings (720 Votes)
2sample mean xbar 66sample standard deviation s 85sample size n 49degrees of freedom df n 1 48Given CI level is 99 hence 1 099 0012 0012 0005 tc t2 df    See Answer
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