When constructing a confidence interval using the percentile method, 95% of means in our bootstrap distribution will be between the lower bound and the upper bound of a confidence interval.This implies that there are 2.5% of the sample means less than the lower bound and 2.5% of the sample means that are greater than the upper bound.Therefore, the lower bound will be at the 2.5th percentile and the upper bound at the 97.5th percentile.

Recall, the lower bound is at the 2.5th percentile. How would you write 2.5% as a proportion?