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

question 19

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:

Task-Oriented

Focused or centered on the completion of specific tasks or objectives rather than on broader goals or social interactions.

Explicit

Clearly expressed or fully stated in the actual text or speech.

Quantitative

Relates to research that focuses on obtaining and analyzing numerical data and statistical information.

Coding Scheme

A systematic way of classifying or categorizing units of analysis.