Estimating the average time, Basic Statistics

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Estimating the average time

Before bidding on a contract, a contractor wants to be 90% confident that he is in error by less than 20 minutes in estimating the average time it takes a certain kind of cement to dry. If the standard deviation of the time it takes to dry can be assumed to be 75 minutes, on how large a sample should he base the estimate?

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Basic Statistics: Estimating the average time

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Request for Solution File

Ask an Expert for Answer!!

Basic Statistics: Estimating the average time

Reference No:- TGS0728421

Have a Question? (oR Write a Review)

Recent Questions Asked Basic Statistics

Q : Normally distributed with a mean

Q : Find minimum pipe size that used to operate turbulent regime

Q : Beginning or the end of a fuel cycle

Q : What is an estimate of barretts price per share

Q : Estimating the average time

Q : Calculate the dead load that can be safely supported

Q : Lack of friction between shoes and the ice

Q : What was the total amount she paid

Q : What is the discretionary payout percentage

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Request for Solution File

Ask an Expert for Answer!!

Basic Statistics: Estimating the average time

Reference No:- TGS0728421

Recent Questions Asked Basic Statistics

Q : Normally distributed with a mean

Q : Find minimum pipe size that used to operate turbulent regime

Q : Beginning or the end of a fuel cycle

Q : What is an estimate of barretts price per share

Q : Estimating the average time

Q : Calculate the dead load that can be safely supported

Q : Lack of friction between shoes and the ice

Q : What was the total amount she paid

Q : What is the discretionary payout percentage

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