For the data in Exercise 48, estimate the number of Internet plans whose cost is

a. greater than $52.43

b. less than $87.74

c. between \($52.43\) and $64.20

Exercise 48

In a survey of 600 homeowners with high-speed Internet, the average monthly cost of a high-speed Internet plan was

\($64.20\) with standard deviation \($11.77\). Assume the plan costs to be approximately bell-shaped. Estimate the number of plans that cost between

• \($40.66\) and $87.74

• \($52.43\) and $75.97