Chapter 13, Problem 3P

### Essentials of Statistics for the B...

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

Chapter
Section

### Essentials of Statistics for the B...

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

# A researcher conducts an experiment comparing three treatment conditions with n = 10 scores in each condition.a. If the researcher uses an independent-measures design, how many individuals are needed for the study and what are the df values for the F-ratio?b. If the researcher uses a repeated-measures design, how many individuals are needed for the study and what are the df values for the F-ratio?

a.

To determine
The numbers of individuals and df values for the F-ratio needed for the independent-measures design.

Explanation

Given info:

A researcher conducts an experiment comparing 3 treatment conditions with n=10 scores in each condition in an independent-measure design.

Calculation:

Let n and k represent the numbers of participants in each treatment and total numbers of treatments respectively. Then,

n=10k=3

In case of independent-measures design, participants in each treatment are different. Let, N represents total numbers of participants in the study, then,

N=nĂ—k=10Ă—3=

b.

To determine
The number of individuals and df values for the F-ratio needed for the repeated-measures design.

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