8 Assume total cholesterol value for a certain population is approximately bell shaped with a mean of 200mg/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 200 and 240 mg/100ml? b) What is the interval containing 95% of all cholesterol levels of this population

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Assume total cholesterol value for a certain population is approximately bell shaped
with a mean of 200mg/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 200 and 240 mg/100ml?
b) What is the interval containing 95% of all cholesterol levels of this population
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