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

question 104

True/False

TABLE 9-3
An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 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 257.3 W.
-Referring to Table 9-3, the null hypothesis will be rejected at 5% level of significance.

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Definitions:

Expected Frequency

The predicted number of times an event or outcome occurs within a specific interval, based on a probability model.

Uniformly Distributed

A type of distribution in which all outcomes are equally likely; the probability density function is constant.

Tax Proposal

A plan or suggestion, typically made by a governing body, to impose or alter taxes.

Multinomial Probability

The probability of achieving a given set of outcomes in a multinomial experiment, where each outcome is based on discrete, mutually exclusive categories.