Thirty-two patients suffering from depression were randomly assigned to one of four drug treatment groups: 0...

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Thirty-two patients suffering from depression were randomly assigned to one of four drug treatment groups: 0 mg (placebo), 1

math Statistics-And-Probability

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Answer 1

Answer #1

(a) The independent variable is the four treatment groups. The dependent variable is the improvement scores.

(b)

Source	SS	df	MS	F
Between	294.63	3	98.21	5.20574
Error	528.24	28	18.86571
Total	822.87	31

The p-value is 0.0055.

Since the p-value (0.0055) is less than the significance level (0.05), we can reject the null hypothesis.

Therefore, we can conclude that there is a significant difference between the four treatment groups.

(c) There is no significant difference.

There is no significant difference.

There is a significant difference.

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Answer 2

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