The answer that you found in 5.36 is probably much lower than the answer that you expected, knowing that 80% of women with breast cancer have positive mammo graphies. Why is it so low? What would...

The answer that you found in 5.36 is probably much lower than the answer that you expected, knowing that 80% of women with breast cancer have positive mammo graphies. Why is it so low?

What would happen to the answer to Exercise 5.36 if we were able to refine our test so that only 5% of women without breast cancer test positive? (In others words, we reduce the rate of false positives.)