As reported by a source for statistics, the mean serum high density of females 20-29 years old is 53. If serum cholestrol is distributed normally with a standard deviation of 13.4, answer the following questions.
A) What proportion of 20-29 year old females have a serum HDL cholestrol level below 39?
B) What proportion of 20-29 year old females have a serum HDL cholestrol level ABOVE 71?
C) What is the probability a randomly selected 20-29 yearold female has a serum HDL cholesterol between 50 and 60?
D) Suppose you area doctor and a 24 year olr patient has an HDL of 30. Is this unusual. Explain using probability?