Standard-size boxes for a particular brand of cereal indicate a net weight of 14 oz. A consumer group purchases a random sample of 50 such cereal boxes and weighs their contents. If the average of these 50 weights is 13.8 oz with a standard deviation of 1.1 oz, does the consumer group have sufficient evidence to conclude that the cereal company is under-filling its packages? Test at the α = .05 level using the P-value method.