Question

A clinical psychologist is comparing (bipolar) manic-depressives with both unipolar manics and unipolar depressives on their...

A clinical psychologist is comparing (bipolar) manic-depressives with both unipolar manics and unipolar depressives on their clinical response to a new type of psychoactive drug. Clinical improvement scores for subjects in all three groups are given below:
Bipolar Manics Depressives
3 4 3
4 4 4
3 5 2
2 3 5
4 4
3
What is the F ratio for this study?

1.02

2.04

3.06

4.08
Math   Statistics-And-Probability   
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Homework Answers

Answer #1

The statistical software output for this problem is:

Analysis of Variance results:

Data stored in separate columns.

Column statistics

Column n Mean Std. Dev. Std. Error
S1 6 3.1666667 0.75277265 0.30731815
S2 5 4 0.70710678 0.31622777
S3 4 3.5 1.2909944 0.64549722

ANOVA table

Source DF SS MS F-Stat P-value
Columns 2 1.9 0.95 1.159322 0.3465
Error 12 9.8333333 0.81944444
Total 14 11.733333

Hence,

F ratio = 1.04

Option A is correct.

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