A medical researcher is working on a new treatment for acertain type of cancer.

Question

A medical researcher is working on a new treatment for acertain type of cancer. The average survival time afterdiagnosis on the standard treatment is two years. In an earlytrial, she tries the new treatment on three subjects who have anaverage survival time after diagnosis of four years. Althoughthe survival time has doubled, the results are not statisticalysignificant even at the 0.10 significance level. Theexplanation is: The sample size is small The placebo effect is present, which limits statisticalsignificance That although the survival time has doubled, in reality theactural increase is really two years The calculation was in error the researchers forgot to includethe sample size That the p-value is smaller than the 0.10 significancelevel A medical researcher is working on a new treatment for acertain type of cancer. The average survival time afterdiagnosis on the standard treatment is two years. In an earlytrial, she tries the new treatment on three subjects who have anaverage survival time after diagnosis of four years. Althoughthe survival time has doubled, the results are not statisticalysignificant even at the 0.10 significance level. Theexplanation is: The sample size is small The placebo effect is present, which limits statisticalsignificance That although the survival time has doubled, in reality theactural increase is really two years The calculation was in error the researchers forgot to includethe sample size That the p-value is smaller than the 0.10 significancelevel

Explanation / Answer

The sample sizeis small The placebo effect is present, which limits statisticalsignificance That although the survival time has doubled, in reality theactural increase is really two years The calculation was in error the researchers forgot to includethe sample size That the p-value is smaller than the 0.10 significancelevel

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