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Determine whether the following statement is true or false: When testing the claim that

Chapter 9, Problem 9

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QUESTION:

Determine whether the following statement is true or false: When testing the claim that the mean annual income of statistics professors in New York is equal to the mean annual income of statistics professors in Illinois, either the two population standard deviations must be known or both samples must include more than 30 values.

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QUESTION:

Determine whether the following statement is true or false: When testing the claim that the mean annual income of statistics professors in New York is equal to the mean annual income of statistics professors in Illinois, either the two population standard deviations must be known or both samples must include more than 30 values.

ANSWER:

Step 1 of 2

False, because the two population standard deviations do not need to be known.

 

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