Exercise

# Critical region

It seems as though the statistic—a difference in promotion rates of 0.2917—is on the extreme end of the permutation distribution. That is, there are very few permuted differences which are as extreme as the observed difference.

To quantify the extreme permuted (null) differences, we use the `quantile()`

function.

The `dplyr`

package has been loaded for you.

Instructions

**100 XP**

Using the permuted differences, `disc_perm`

, find the quantile values of `stat`

such that:

- 10% of the permuted differences are above the value (0.9 quantile)
- 5% of the permuted differences are above the value (0.95 quantile)
- 1% of the permuted differences are above the value (0.99 quantile)