The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget
weights have a mean of 65 ounces and a standard deviation of 5 ounces.
Use the Standard Deviation Rule, also known as the Empirical Rule.
Suggestion: sketch the distribution in order to answer these questions. Be sure to include the z scores and
raw data scores underneath the sketch.
a) 99.7% of the widget weights lie between
and
b) What percentage of the widget weights lie between 60 and 80 ounces?
c) What percentage of the widget weights lie above 55 ?
%
%
