When constructing a confidence interval for a difference between two population proportions, why is it important to check that the number of successes and the number of failures in each sample is at least 10? Select the correct answer A. So we can assume that the two samples are independent.
B. So we can assume the sampling distribution of Di-D is approximately Normal,
C. So we can assume that the observations within each sample are independent
D. So we can assume that population 1 and population 2 are approximately Normal.
E. So we can generalize the results to the populations from which the samples were selected.

Adriveway is 40 yards long about how many meters long is it

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827