An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 260 W. From previous studies, it is believed that power consumption for microwave ovens is normally distributed with a population standard deviation of 15 W. A consumer group has decided to try to discover if the claim appears true. They take a sample of 20 microwave ovens and find that they consume a mean of 265 W. The population of interest is

Question

A)the power consumption in the 20 microwave ovens.


B)the power consumption in all such microwave ovens.


C)the mean power consumption in the 20 microwave ovens.


D)the mean power consumption in all such microwave ovens.

Answer 1

The population of interest in this scenario is:

B) the power consumption in all such microwave ovens.

This is because the consumer group is investigating whether the manufacturer's claim about the mean power consumption of all compact microwave ovens is true, rather than just the specific sample that they tested.