D Question 2 2 pts During a semester, I taught one class of statistics and two classes of precalculus. 18 out of 35 students in statistics are male, and 34 out of 57 students in precalculus are male. Suppose each of these sample proportions are random samples taken from the population of all WCU students that are taking statistics or precalculus. Let p, represent the sample proportion of male students taking statistics and pp represent the sample proportion of male students taking precalculus. What is the upper boundary of a 99% confidence interval for the difference of population proportions Ps - Pp . Give your answer as a decimal rounded to 3 places after the decimal. Hint: Treat this as a t-interval. Use the conservative method for finding the degrees of freedom (n-1 of the smaller sample size)