In a New York modeling agency, a researcher wishes to see if the average height of female models is really less than 67 inches, as the chief claims. A random sample of 20 models has an average height of 65.8 inches. The standard deviation of the sample is 1.7 inches. At $ alpha=0.05$, is the average height of the models really less than 67 inches? List test, p-value, and decision.

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

In a New York modeling agency, a researcher wishes to see if the average height of female models is really less than 67 inches, as the chief claims. A random sample of 20 models has an average height of 65.8 inches. The standard deviation of the sample is 1.7 inches. At

A	z-test,
B	z-test,
C	t-test,
D	t-test,

Explanation:

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RESEARCH METHODOLOGY

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