Grace Floral Shop claims that their average daily earnings is $497. An auditor wants todetermine whether this claim is true. The auditor randomly selected a sample of 100 days and found that the...

Grace Floral Shop claims that their average daily earnings is $497. An auditor wants todetermine whether this claim is true. The auditor randomly selected a sample of 100 days and found that the sample mean earnings was $495 with a sample standard deviation of 9.75.
a) Calculate the 97% confidence interval for the population mean daily earning.