Question: Assume total cholesterol value for a certain population is approximately bell shaped with a mean of 180mg/100ml and a standard deviation of 20mg/100ml. a) What

Assume total cholesterol value for a certain population is approximately bell shaped with a mean of 180mg/100ml and a standard deviation of 20mg/100ml.

a) What is the proportion that an individual picked at random from this population will have a cholesterol level between 180 and 220 mg/100ml?

b) What is the proportion that an individual picked at random from this population will have a cholesterol level between 200 and 220 mg/100ml?

c) What is the interval containing 68% of all cholesterol levels of this population?

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