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Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 2.00 gallons. From his records, he selects a random sample of 65 sales and finds the mean number of gallons sold is 9.10. a) What is the point estimate of the population mean? (Round your answer to 2 decimal places.)   b) Develop a 98% confidence interval for the population mean. (Use z Distribution Table.) (Round your answers to 2 decimal places.) confidence interval _______and ___________

Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 2.00 gallons. From his records, he selects a random sample of 65 sales and finds the mean number of gallons sold is 9.10. a) What is the point estimate of the population mean? (Round your answer to 2 decimal places.)   b) Develop a 98% confidence interval for the population mean. (Use z Distribution Table.) (Round your answers to 2 decimal places.) confidence interval _______and ___________

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
Section10.3: Measures Of Spread
Problem 26PFA
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Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 2.00 gallons. From his records, he selects a random sample of 65 sales and finds the mean number of gallons sold is 9.10.

a) What is the point estimate of the population mean? (Round your answer to 2 decimal places.)

 

b) Develop a 98% confidence interval for the population mean. (Use z Distribution Table.) (Round your answers to 2 decimal places.)

confidence interval _______and ___________

 

 

 

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