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Asked Dec 4, 2019

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Question 3

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Step 1

Here, the sample mean, *x*-bar is 279.

Sample standard deviation, *s* = 71.

Sample size, *n* is 40.

Population mean, *µ* =306.

*Hypotheses:*

*Null hypothesis:*

*H*0: *µ* =306

*Alternative hypothesis:*

*H*1: *µ* <306

Since the alternative hypothesis states µ <306, this test is a left-tailed test.

Also, population st...

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