A researcher conducted an experiment on the effects of a

Reference no: EM13615162

A researcher conducted an experiment on the effects of a new "drug "on depression. The researcher had a control group that received nothing, a placebo group, and an experimental group that received the "drug." A depression inventory that provided a measure of depression on a 50-point scale was used (50 indicates that an individual is very high on the depression variable).

Source	df	SS	MS	F
Between	2	1,202.30	601	3.23
Within	42	2,118.00	50.42
total	44	3,320.31

a. Is Fobt significant at Fobt= .05; at Fobt= .01?

b. Perform post hoc comparisons if necessary.

c. What conclusions can be drawn from the F-ratio and the post hoc comparisons?

d. What is the effect size, and what does this mean?

e. Graph the means.

Reference no: EM13615162

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