Bob Nale is the owner of Nale\'s Quick Fill. Bob would like to estimate the mean
ID: 2843096 • Letter: B
Question
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 2.20 gallons. From his records, he selects a random sample of 50 sales and finds the mean number of gallons sold is 8.10.
What is the point estimate of the population mean? (Round your answer to 2 decimal places.)
Determine a 98% confidence interval for the population mean. (Round your answers to 2 decimal places.)
(a)What is the point estimate of the population mean? (Round your answer to 2 decimal places.)
Explanation / Answer
8.6
2.6775 to 14.5225
We are 99% sure that the mean of the population falls between 2.6775 and 14.5225.