The distribution of cholesterol levels in teenage boys is approximately normal with and (Source: U.S. National Center for Health Statistics). Levels above 200 warrant attention.

Question

The distribution of cholesterol levels in teenage boys is approximately normal with and (Source:

U.S. National Center for Health Statistics). Levels above 200 warrant attention.

a) Find the probability that a teenage boy has a cholesterol level less than 200.

b) If there are 150 teenage boys, how many would you expect to have a cholesterol level greater than 200?

Answer 1

Hi Eddie Z.,

You've asked 4 questions at the same time on essentially the same topic and requiring the same skills to solve. That's spamming; we're not here to solve your entire problem sets for you. Please cut your questions down to one (the hardest, perhaps?) and someone will undoubtedly help you!

-- Cheers, --Mr. d.