Question

The cholesterol levels of an adult can be described by a normal model with a mean of 187 mg/dL and a standard deviation of 28. a) What percent of adults do you expect to have cholesterol levels over 210 mg/dL? (round to two decimal places) b) What percent of adults do you expect to have cholesterol levels between 150 and 160 mg/dL? (round to two decimal places) c) Estimate the interquartile range of cholesterol levels. IQR = ____ (round to the nearest integer) d) Above what value are the highest 15% of adults' cholesterol levels? (round to the nearest integer)

Name: the cholesterol levels of an adult can be described by a normal model with a mean of 187 mgdl and a standard deviation of 28 what percent of adults do you expect to have cholesterol levels o 95342
Uploaded: 2023-02-19T23:04:36-08:00
Duration: 6 min 29 s
Channel: Samriddhi Singh
Description: the cholesterol levels of an adult can be described by a normal model with a mean of 187 mgdl and a standard deviation of 28 what percent of adults do you expect to have cholesterol levels o 95342

          The cholesterol levels of an adult can be described by a normal model with a mean of 187 mg/dL and a standard deviation of 28.

a) What percent of adults do you expect to have cholesterol levels over 210 mg/dL? (round to two decimal places)

b) What percent of adults do you expect to have cholesterol levels between 150 and 160 mg/dL? (round to two decimal places)

c) Estimate the interquartile range of cholesterol levels.
IQR = ____ (round to the nearest integer)

d) Above what value are the highest 15% of adults' cholesterol levels? (round to the nearest integer)

Added by Adam S.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Samriddhi Singh

02/19/2023

Step 1

The z-score is calculated as (X - μ) / σ, where X is the value we're interested in, μ is the mean, and σ is the standard deviation. So, the z-score for 210 is (210 - 187) / 28 = 0.82. Looking up this z-score in a standard normal distribution table, we find that Show more…

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The cholesterol levels of an adult can be described by a normal model with a mean of 187 mg/dL and a standard deviation of 28. a) What percent of adults do you expect to have cholesterol levels over 210 mg/dL? (round to two decimal places) b) What percent of adults do you expect to have cholesterol levels between 150 and 160 mg/dL? (round to two decimal places) c) Estimate the interquartile range of cholesterol levels. IQR = ____ (round to the nearest integer) d) Above what value are the highest 15% of adults' cholesterol levels? (round to the nearest integer)