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% ofkindergarteners?

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 689599.7 Rule.

a.Using the68-95-99.7 rule, about _____% of autos should get between 33 and 38.2 mpg.