An archive the questions from Mark's Summer 2018 Stat 185.

Question 10 Final Review SE calculation

jmahan

Did anyone get their standard error to equal 0.0195 for question 10?

When I computed it I did the following:

SE=sqrt((21/194(1-21/194))/194)=0.223

The problem states the standard error should be 0.0195 and I am unsure of what I am doing wrong.

mark

When running a hypothesis test, the problem is to determine the probability that the observed data could arise under the assumption of the null hypothesis. As a result, the null hypothesis that p=0.08 drives the determination of the standard error. Thus:

SE = \sqrt{\frac{0.08\times0.92}{194}} \approx 0.0195.