Rosanne is the floor manager at Yesbe Beauty Products, who takes care of the face cream

section. One of her tasks is to make sure that the face cream mini packs weigh four ounces (4.0) on

average. Assume that the standard deviation of the weight of the mini packs is known to be 0.1 ounces.

Rosanne tasks one of her employees to choose 30 packs at random and find the average weight is 4.05.

Assume the significance level is 10%.

(a) (2 points) What are the appropriate null and alternative hypotheses?

(b) (10 points) Please use the critical value approach to test the null.

(c) (10 points) Please use the p-value approach to test the null.