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NBME 22 Answers

nbme22/Block 3/Question#26

A study is conducted to assess the extent of ...

Type I error: No change;
Type II error: decreased


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 +8  upvote downvote
submitted by bhangradoc(9),

The P-value is basically type 1 error, and they keep the p-value the same (at <.05) in both versions of the experiments. By increasing number of patients in the group, they increase power of the study, which reduces type II error.

jfny21  Thank you +  




 +0  upvote downvote
submitted by _pusheen_(1),

No change in type 1 error and decrease in type 2 error? Can someone please explain why?

bhangradoc  The P-value is basically the type 1 error, and they keep the p-value the same (at <.05) in both versions of the experiments. By increasing number of patients in the group, they increase power of the study, which reduces type II error. +1  




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submitted by sam1(0),

If anyone needs a refresher on these statistical concepts, Khan has a brilliant video:

https://www.khanacademy.org/math/ap-statistics/tests-significance-ap/error-probabilities-power/v/introduction-to-type-i-and-type-ii-errors