The U.S. Mint has a specification that pennies have a mean weight of 2.5 g. Thirty randomly

Question:

The U.S. Mint has a specification that pennies have a mean weight of 2.5 g. Thirty randomly selected pennies have a mean weight of 2.49910 g and a standard deviation of 0.01648 g. Use a 0.05 significance level to test the claim that this sample is from a population with a mean weight equal to 2.5 g. Do pennies appear to conform to the specifications of the U.S. Mint?