Bob Nale is the owner of Name's Quick Fill. Bob would like to estimate the mean number of gallons sold follows the normal distribution with a population standard deviation of 2.50 gallons. From his record he selects a random sample of 45 sales and finds the mean number of gallons sold at 8.30

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

Point estimate

b) Determine a 95% confidence interval for the population mean ( Round your answer to 2 decimal pla.