Use the traditional method. Be sure to include the null and alternative, significance level, critical value(s), the test statistic with calculations shown, the properly drawn graph, decision criteria, decision and one of the four possible conclusions. Don't forget to answer the question at the end of the problem.

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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Use the traditional method. Be sure to include the null and alternative, significance level, critical value(s), the test statistic with calculations shown, the properly drawn graph, decision criteria, decision and one of the four possible conclusions. Don't forget to answer the question at the end of the problem. 

 

**Ginkgo for Dementia**

The herb ginkgo biloba is commonly used as a treatment to prevent dementia. In a study of its effectiveness, 1673 elderly subjects were given ginkgo and 1964 elderly subjects were given a placebo. Among those in the ginkgo group, 231 later developed dementia, and among those in the placebo group, 252 developed dementia. Use a 0.05 significance level to test the claim that ginkgo is effective in preventing dementia. Based on your results, is ginkgo effective in preventing dementia?
Transcribed Image Text:**Ginkgo for Dementia** The herb ginkgo biloba is commonly used as a treatment to prevent dementia. In a study of its effectiveness, 1673 elderly subjects were given ginkgo and 1964 elderly subjects were given a placebo. Among those in the ginkgo group, 231 later developed dementia, and among those in the placebo group, 252 developed dementia. Use a 0.05 significance level to test the claim that ginkgo is effective in preventing dementia. Based on your results, is ginkgo effective in preventing dementia?
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