1/ A company has a policy of retiring company cars; this policy looks at number of miles driven, purpose of trips, style of car and other features. The distribution of the number of months in service for the fleet of cars is bell-shaped and has a mean of 37 months and a standard deviation of 3 months. Using the Empirical Rule rule, what is the approximate percentage of cars that remain in service between 40 and 46 months?

Do not enter the percent symbol.

ans =

2/ The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 59 ounces and a standard deviation of 4 ounces.

Use the Empirical Rule.

Suggestion: sketch the distribution in order to answer these questions.

a) 68% of the widget weights lie betweenand

b) What percentage of the widget weights lie between 47 and 63 ounces?%

c) What percentage of the widget weights lie (do not round) above 51 ?%