Question

2. An appliance manufacturer claims to have developed a compact microwave oven that consumes an average of 250 watts. From previous studies, it is believed that power consumption for microwave ovens is normally distributed with a standard deviation of 15 watts. A consumer group has decided to have you discover if the manufacturer’s claim appears true using a 2% level of significance. They provide you with a sample of 20 microwave ovens. The microwaves consume an average of 259.3 watts.

a. Find p-value.

Answer 1