During the investigation of an alleged unfair trade practice,
the Federal Trade Commission takes a random sample of 50 “3-ounce”
candy bars from a large shipment. If the mean and the standard
deviation of their weights are, respectively, 2.92 ounces and 0.21
ounce, determine at the level of 0.01 significance whether the
commission has grounds upon which to proceed against the
manufacturer on the unfair practice of short-weight selling. State
hypotheses, P-value, and conclusion.