SOLUTION: Hi! Please help with the following question! Thanks! The distribution of cholesterol levels in teenage boys is approximately normal with a mean of 170 and standard distribution

Algebra ->  Probability-and-statistics -> SOLUTION: Hi! Please help with the following question! Thanks! The distribution of cholesterol levels in teenage boys is approximately normal with a mean of 170 and standard distribution      Log On


   

Question 1179206: Hi! Please help with the following question! Thanks!
The distribution of cholesterol levels in teenage boys is approximately normal with a mean of 170 and standard distribution of 30. Levels above 200 warrant attention. If 95 teenage boys are examined, how many would you expect to have cholesterol levels greater than 225?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Distribution: approximately normal with µ = 170 and σ = 30

Using TI or similarly an inexpensive calculator like an Casio fx-115 ES plus

Population:

P(x > 225) = normalcdf(225,9999,170,30) = .0334  0r 3.34%





SAMPLE: n =95

P(x > 225) = normalcdf(225,9999,170,30/√95) = basically zero %  



Wish You the Best in your Studies.µ = 100 and σ = 15