TABLE 9-3 An Appliance Manufacturer Claims to Have Developed a Compact Microwave

question 92

Short Answer

TABLE 9-3
An appliance manufacturer claims to have developed a compact microwave oven that consumes an average of no more than 250 W. From previous studies, it is believed that power consumption for microwave ovens is normally distributed with a 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 an average of 257.3 W.
-Referring to Table 9-3, what is the power of the test if the average power consumption of all such microwave ovens is in fact 248 W using a 0.10 level of significance?

---

Definitions:

P.T. Barnum

A 19th-century American showman and businessman remembered for promoting celebrated hoaxes and for founding the Barnum & Bailey Circus.

Publicity Stunts

Intentionally designed events or activities created to attract public attention and media coverage, often used by marketers or public relations professionals to generate interest.

Press Conference

A media event in which an organization or individual presents information and answers questions from journalists.

Corporate Social Responsibility

A concept where businesses integrate social and environmental concerns in their operations and interactions with their stakeholders.