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Chapter 2: Q. 3.2 (page 124)

Follow the method shown in the examples to answer each of the following questions. Use your calculator or the Normal Curve applet to check your answers.

2. People with cholesterol levels between 200and 240mg/dlare at considerable risk for heart disease. What percent of 14-year-old boys have blood cholesterol between 200and 240mg/dl?

Short Answer

Expert verified

The percentage of 14-year-old boys have blood cholesterol between 200and 240mg/dlis 15%.

Step by step solution

01

Given Information 

People with cholesterol levels between =200and240mg/dl

Age of boys=14yearold

02

Explanation  

People with cholesterol levels between200and240mg/dl

Find and interpret P(200鈮�X鈮�240)

localid="1649921003530" =normalcdf(lower:200,upper:240,渭=170,蟽=30)=0.1488

There's about a 15%chance that a randomly selected 14-year old boy will have a cholesterol level between 200and 240mg/dl.

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