Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

Exercise 67

Statistical Literacy Consider a hypothesis test of difference of proportions for two independent populations. Suppose random samples produce r 1 successes out of n 1 trials for the first population and r 2 successes out of n 2 trials for the second population. What is the best pooled estimate
for the population probability of success using H 0 : p 1 = p 2