statistics, confidence interval, hypothesis testing

Anonymous
timer Asked: Dec 15th, 2018
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Question description

Example: The herb ginkgo biloba is commonly used as a treatment to prevent dementia. In a study of effectiveness of this treatment, 1545 elderly subjects were given ginkgo and 1524 elderly were given placebo. Among those in the gingko treatment group, 246 later developed dementia, and among those in the placebo group, 277 later developed dementia (based on data from the Journal of the American Medical Association). We want to use a 0.01 significance level to test the claim that ginkgo is effective in preventing dementia.

Tutor Answer

geobalies
School: University of Virginia

Attached.

The herb ginkgo biloba is commonly used as a treatment to prevent dementia. In a study of
effectiveness of this treatment, 1545 elderly subjects were given ginkgo and 1524 elderly were given
placebo. Among those in the gingko treatment group, 246 later developed dementia, and among those
in the placebo group, 277 later developed dementia (based on data from the Journal of the American
Medical Association). We want to use a 0.01 significance level to test the claim that ginkgo is effective in
preventing dementia.

Part 1: Test the claim using a hypothesis test.
Step 1: Label all given information.
Treatment with ginkgo=1545, gingko grou...

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Review

Anonymous
Good stuff. Would use again.

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