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

question 75

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 probability of making a Type II error if the average power consumption of all such microwave ovens is in fact 257.3 W using a 0.05 level of significance?

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Definitions:

Personal Computer Industry

The sector of the economy that manufactures and markets desktop, laptop, and related personal computing devices.

Composite Score

An overall rating or assessment made up of several individual scores or measurements.

Holding Cost Rate

The percentage of the value of inventory held in storage, reflecting the cost associated with storing and maintaining it over a given period.

Economical

Pertaining to efficient resource usage or offering good value for money.