According to her doctor, Mrs. Brown's cholesterol level is higher than only 5% of the females aged 50 and over. The cholesterol levels among females aged 50 and over are approximately normally distributed with a mean of 235 mg/dL and a standard deviation of 30 mg/dL . What is Mrs. Brown's cholesterol level? Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.
Added by Samuel W.
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We know that Mrs. Brown's cholesterol level is higher than only 5% of the females aged 50 and over. So, we need to find the z-score corresponding to the 5th percentile. Show more…
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