(Solved) A drug for treating depression patients is evaluated for effectiveness. Three treatment options ...

A drug for treating depression patients is evaluated for effectiveness. Three treatment options exist: 20 mg, 10 mg, and placebo (20, 10, P). Twelve patients are randomly assigned to provide 4 patients for each level. The change in score from a common test designed to quantify depression was recorded for each patient. The ANOVA summary from the test appears below:

Source	df	SS	MS	F	p
Factor	2	228.17	114.08	34.81	0.000
Error	9	29.50	3.28
Total	11	257.67

Does it appear that the drug might be effective in changing depression level? Select the appropriate conclusion and reasoning.

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No, the drug does not appear to have an effect on depression level because the test statistic is so large.

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Yes, the drug (or perhaps the placebo) appears to have an effect on depression level because thep-value is essentially zero.

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No, the drug does not appear to have an effect on depression level because thep-value is essentially zero.

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The test is inconclusive and needs a multiple comparison of means procedure to be able to make any statement concerning the relationship between the drug/placebo and depression.

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A drug for treating depression patients is evaluated for effectiveness. Three treatment options ...

Introductory Statistics: A Problem-Solving Approach

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