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# Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of litres (L) of gasoline sold to

## Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of litres (L) of gasoline sold to his customers. Assume the number of litres sold follows the normal distribution with a standard deviation of 24 L. From his records, he selects a random sample of 21 sales and finds the mean number of litres sold is 65. a. What is the point estimate of the population mean? (Round the final answer to the nearest whole number.) The point estimate of the population mean is litres. b. Develop a 80% confidence interval for the population mean. (Round the final answers to 3 decimal places.) The 80% confidence interval for the population mean is between c. Interpret the meaning of part (b). and If 100 such intervals were determined, the population (Click to elect) would be included in about (Click to select) variance mean intervals. Q Search < Prev 3 of 14 Next > ENG US Previous surveys estimated that 19% of students use the college gym. The manager would like to verify this estimate within plus or minus 0.08. At a 80% level of confidence, how large a sample is required? (Round the intermediate calculation to 2 decimal places. Round the final answer to the nearest whole number.) The sample size is Q Search 1C Mostly clear hp B ENG 45 US 8:47 PM 2023-03-24 6 144 112 home DTE SC delete

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