For a particular age group of adult females, the distribution of ...

[stevenposner]

For a particular age group of adult females, the distribution of cholesterol readings, in mg/dl, is normally distributed with a mean of 180 and a standard deviation of 12. What percentage would have readings less than 156?

Question 2

For a particular age group of adult females, the distribution of cholesterol readings, in mg/dl, is normally distributed with a mean of 180 and a standard deviation of 12. What percentage of this population would have readings exceeding 210?

[ladyjames123]

Answer to Question 1

P(x < 156) = P(z < -2) = 0.5000  0.4772 = 0.0228 or 2.28

Answer to Question 2

P(x > 210) = P(z > 2.5) = 0.5000  0.4938 = 0.0062, or 0.62

[stevenposner]

TY

[ladyjames123]

You're welcome