Design furniture for elementary school classrooms

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1. Companies who design furniture for elementary school classrooms produce a variety of sizes for kids of different ages. Suppose the heights of kindergarten children can be described by a Normal model with a mean of 39.2 inches and standard deviation of 1.9inches.

a. At least how tall are the biggest 30?% of? kindergarteners?

2. The cholesterol levels of an adult can be described by a normal model with a mean of 194 ?mg/dL and a standard deviation of 28.

a. What percent of adults do you expect to have cholesterol levels over 210 ?mg/dL?

3. Fuel economy estimates for automobiles built one year predicted a mean of 27.8 mpg and a standard deviation of 5.2 mpg for highway driving. Assume that a Normal model can be applied. Use the 68-95-99.7 Rule.

a. Using the? 68-95-99.7 rule, about _____?% of autos should get between 33 and 38.2 mpg.

Reference no: EM132377700

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