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Cholesterol levels for a group of women aged 30-39 follow an approximately normal distribution with mean...

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Basic Math

Cholesterol levels for a group of women aged 30-39 follow anapproximately normal distribution with mean 190.14 milligrams perdeciliter (mg/dl). Medical guidelines state that women withcholesterol levels above 240 mg/dl are considered to have highcholesterol and about 9.3% of women fall into this category.

1. What is the Z-score that corresponds to thetop 9.3% (or the 90.7-th percentile) of the standard normaldistribution? Round your answer to three decimal places.

2. Find the standard deviation of thedistribution in the situation stated above. Round your answer to 1decimal place.

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