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

question 82

Short Answer

Instruction 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 Instruction 9-3,for a test with a level of significance of 0.05,the critical value would be ________.

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Definitions:

Production Technique

The method or process used by a company or industry to create goods or services, often involving specific technologies or procedures.

Price Of Labor

The wages or salary that workers receive in exchange for their labor or services in the job market.

Widgets

A general term commonly used to describe any theoretical produced item or merchandise.