1. Heavy bread? The mean weight of loaves of bread produced at the bakery is supposed to be 1 pound. You are the supervisor of quality control at the bakery, and you are concerned that the new employees are producing loaves that are to light. Suppose we take a random sample of 40 loaves and find the mean weight is 0.975 pound with a standard deviation of 0.4 pound. Create / interpret a 95% confidence interval for the mean weight of loaves of bread produced at the bakery.

1. From the confidence interval, should you be concerned the loaves of bread are not meeting the 1 pound standard?

1. How many loaves of bread would we need to sample in order to cut the margin of error in half?