The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a
Question:
The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a bell-shaped distribution. This distribution has a mean of 50 and a standard deviation of 9. Using the empirical rule, what is the approximate percentage of 1-mile long roadways with potholes numbering between 41 and 77?
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 63 ounces and a standard deviation of 9 ounces.
Use the Empirical Rule.
Suggestion: sketch the distribution in order to answer these questions.
a) 95% of the widget weights lie betweenand
b) What percentage of the widget weights lie between 36 and 81 ounces?%
c) What percentage of the widget weights lie below 72 ?