Mr. Fields Bakery makes Chocolate Chip Sweetie cookies, that when baked are a standard 6 oz. of dough. The Mr. Fields Bakery on Hyde Park Road has had customers complaining that the Chocolate Chip Sweeties they have been baking, have a different amount of dough than 6 oz. Mr. Field decides to take a random sample of 81 different Chocolate Chip Sweeties and he found that the average weight of the Chocolate Chip Sweeties in the sample was 6.34 oz., with a standard deviation of 1.2 oz. Using a 5% significance level, test the claim that the Chocolate Chip Sweeties are not the 6 oz, they should be at Mr. Fields bakery on Hyde Park.

(Remember your units) (Round all statistics and answer to four decimal places)

b) Why would or should Mr. Field care?