a cocktail hostess claims that her average tip for last year was less than $4.75.
The IRS is auditing her tax return this year. To support her claim, she sent the IRS a random sample of 52 credit card receipts showing her bar tips. When the IRS got the receipts, they computed the sample mean and found it to be $5.25 with a sample standard deviation of $1.15. Test the claim using alpha 0.01 significance level.
The IRS is auditing her tax return this year. To support her claim, she sent the IRS a random sample of 52 credit card receipts showing her bar tips. When the IRS got the receipts, they computed the sample mean and found it to be $5.25 with a sample standard deviation of $1.15. Test the claim using alpha 0.01 significance level.