   Chapter 8.3, 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 conducts a hypothesis test with α = .05 to evaluate the effectiveness of a treatment. Assume that the sample mean produces a z-score of z = 2.17. a. Do the data indicate that the treatment has a significant effect? b. Write a sentence describing the outcome of the hypothesis test as it would appear in a research report.

a.

To determine
Whether the data indicates that the treatment has a significant effect.

Explanation

Given info:

The test statistic z=2.17 with the level of significance α=0.05.

Calculation:

The test hypotheses are:

H0: There is no significant effect of the treatment.

H1: There is significant effect of the treatment.

From the standard normal table, the critical region with α=0

b.

To determine

To Describe: The outcome of the hypothesis test.

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