Question: A restaurant that bills its house account monthly is concerned that the average monthly bill exceeds $200 per account. A random sample of twelve accounts is selected, resulting in a sample mean of $220 and a standard deviation of $12. The t-test is to be conducted at the 5% level of significance.

a. What is H₀? _______________________________

b. What is H1? _______________________________

c. What is the critical value of t? ______________________

d. What is the calculated value of t? _________ _____

e. What is your decision? ____________ ________________