Sandwiches Sold at a Local Grocery Store Claim to Have

Multiple Choice

Sandwiches sold at a local grocery store claim to have 6 grams of fat per sandwich.Ten sandwiches are brought with results of a mean of 5.93g of fat and a standard deviation of 0.13g.If fat content is normally distributed,how large a sample of sandwiches would we need to be 95% confident that the sample mean is within 0.03g of the population mean?

A) 97
B) 96
C) 73
D) 62
E) 10