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An experiment was run to compare three groups. The sample sizes were 28, 33, and 102, and the corresponding estimated standard deviations were 2.7, 2.6 and 4.8.  A) Is it reasonable to use the assumprion of equal standard deviation when we analyze these data? Give a reason for the answer. B) Give the Values of the Variances for the three groups. C) Find the pooled variance.

An experiment was run to compare three groups. The sample sizes were 28, 33, and 102, and the corresponding estimated standard deviations were 2.7, 2.6 and 4.8.  A) Is it reasonable to use the assumprion of equal standard deviation when we analyze these data? Give a reason for the answer. B) Give the Values of the Variances for the three groups. C) Find the pooled variance.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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An experiment  was run to compare three groups. The sample sizes were 28, 33, and 102, and the corresponding estimated standard deviations were 2.7, 2.6 and 4.8. 

A) Is it reasonable to use the assumprion of equal standard deviation when we analyze these data? Give a reason for the answer.

B) Give the Values of the Variances for the three groups.

C)  Find the pooled variance.

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