Driving under the influence of alcohol DUI is a serious offe

Driving under the influence of alcohol (DUI) is a serious offense. The following data give the ages of a random sample of 50 drivers arrested while driving under the influence of alcohol. This distribution is based on the age distribution of DUI arrests given in the Statistical Abstract of the United States

(b) Make a frequency table using seven classes.

Class Limits

Class Boundaries

Midpoint

Frequency

Relative Frequency

Cumulative Frequency

Solution

Data cumulative lower upper midpoint width frequency percent      frequency percent 16 < 26 21 10 12   24.0   12   24.0   26 < 36 31 10 17   34.0   29   58.0   36 < 46 41 10 9   18.0   38   76.0   46 < 56 51 10 8   16.0   46   92.0   56 < 66 61 10 4   8.0   50   100.0   50   100.0