The manager of a paint supply store wants to determine whether the mean amount of paint contained in 1-gallon cans purchased from a nationally known manufacturer is actually 1 gallon. You know from the manufacturers specifications that the standard deviation of the amount of paint is 0.02 gallon. You select a random sample of 50 cans, and the mean amount of paint per 1-gallon can is 0.995 gallon.

What is the null hypothesis?What is the alternative hypothesis?What is the decision rule you will use?What test statistic do you calculate to test your hypothesis?Based on your decision rule and the test statistic you calculated, what is your decision?

To determine if there is evidence that the mean amount is different from 1.0 gallon (using = 0.01), answer the questions below which follow the critical value approach to hypothesis testing.

What is the null hypothesis?