- 1.
- If you didn't do it, use class code to obtain a 95% confidence interval for the true difference in proportions for the above example of the two different drugs.
- 2.
- Should the president be worried? Polls of wealthy financial backers before and after she made a controversial decision were tabulated and given to her.
What do you think? Base your answer on a 95% confidence interval.
Will Contribute Will Not Before Decision 68 13 After Decision 38 20

- 3.
- In the example of the two different drugs found above, the sorted resampled differences in proportions were given. Here's a dot plot of them. Locate the
estimate and the confidence interval on it.
: : : : . : : : : : : : : : . : : : : : : :.:.. : : . . . : .. .: :.: :.:.:.:::::.: . :.:. .. . . . +---------+---------+---------+---------+---------+-------C1 -0.50 -0.40 -0.30 -0.20 -0.10 0.00