Test Hypotheses About a Population Mean with Unknown
-A Local $11.7$

Test Hypotheses about a Population Mean with Unknown
-A local juice manufacturer distributes juice in bottles labeled 12 ounces. A government agency thinks that the company is cheating its customers. The agency selects 20 of these bottles, measures their contents, and obtains a sample mean of $11.7$ ounces with a standard deviation of $0.7$ ounce. Use a $0.01$ significance level to test the agency's claim that the company is cheating its customers.