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Confidence interval for the mean monthly electric bills

The average monthly electric bill of a random sample of 256 residents of a city is $90 with a standard deviation of $24.

a. Construct a 90% confidence interval for the mean monthly electric bills of all residents.

b. Construct a 95% confidence interval for the mean monthly electric bills of all residents.

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Basic Statistics: Confidence interval for the mean monthly electric bills

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Q : Confidence interval for the mean monthly electric bills

The average monthly electric bill of a random sample of 256 residents of a city is $90 with a standard deviation of $24. Construct a 90% confidence interval for the mean monthly electric bills of all residents.

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Solution Preview :

Prepared by a verified Expert

Basic Statistics: Confidence interval for the mean monthly electric bills

Reference No:- TGS0690911

Have a Question? (oR Write a Review)

Recent Questions Asked Basic Statistics

Q : How much of these intercompany loans and profits

Q : Calculate the amortization of bond premium for six months

Q : Calculate the current,power and back emf of motor

Q : Calculate change in mechanical energy

Q : Confidence interval for the mean monthly electric bills

Q : Calculate the average investment cost

Q : Determine the confidence coefficient

Q : What are the primary information needs of each manager

Q : Determine the standard error of the mean

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Solution Preview :

Prepared by a verified Expert

Basic Statistics: Confidence interval for the mean monthly electric bills

Reference No:- TGS0690911

Recent Questions Asked Basic Statistics

Q : How much of these intercompany loans and profits

Q : Calculate the amortization of bond premium for six months

Q : Calculate the current,power and back emf of motor

Q : Calculate change in mechanical energy

Q : Confidence interval for the mean monthly electric bills

Q : Calculate the average investment cost

Q : Determine the confidence coefficient

Q : What are the primary information needs of each manager

Q : Determine the standard error of the mean

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