   Chapter 8.4, Problem 1LC Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

Solutions

Chapter
Section Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

A researcher selects a sample from a population with a mean of µ. = 60 and administers a treatment to the individuals in the sample. If the researcher predicts that the treatment will increase scores, then a. Using symbols, state the hypotheses for a one-tailed test. b. For the one-tailed test, would the critical region be located in the right-hand tail or the left-hand tail of the distribution?

(a)

To determine

To state: The null hypothesis and alternative hypothesis for one-tailed test.

Explanation

The test hypothesis are given below:

Null hypothesis:

H0:μ60

That is, the mean score is less than or equal to 60

(b)

To determine

To identify: The location of the critical region for one tailed test.

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