Rcfer to the Merck Research Labs experiment designed to evaluate the effect of a new drug using rats in a single-T swim maze, Exercise 7.33

(p. 373). How many matched pairs of male and female rat pups need to be included in the experiment in order to estimate the difference between the mean number of swim attempts required to escape to within 1.5 attempts with 95% confidence? Use the value of s, found in Exercise 7.33 in your calculations.