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Essentials of Statistics for the B...

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

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Chapter
Section
BuyFindarrow_forward

Essentials of Statistics for the B...

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

The following data summarize the results from an independent-measures study comparing three treatment conditions.

  images

a. Calculate the sample variance for each of the three samples.

b. Use an ANOVA with α = .05 to determine whether there are any significant differences among the three treatment means.

a.

To determine

To find: The sample variance for each of the three samples.

Explanation

Given info:

The data values and details are provided in the question.

Treatment 1 Treatment 2 Treatment 3

 

N=12G=48X2=238

n=4 n=4 n=4
M=4 M=2 M=6
T=16 T=8 T=24
SS=2 SS=4 SS=8

Calculations:

The formula for sample variances is

s2=SSn1

For treatment 1:

s12=SS1n11 <

b.

To determine

To find: Whether there are any significant differences among the three treatments means using ANOVA with α=0.05

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