A transportation company compiles data on motorcycle accidents. During one year, the numbers of motorcycle accidents in a particular country were tabulated by day of the week for builtup roads and nonbuiltup roads and resulted in the accompanying data table.

Complete parts (a)-

(d) below.

Motorcycle Accidents During the Week Day Built-up Non–built-up Monday 92 76 Tuesday 101 58 Wednesday 79 59 Thursday 98 53 Friday 105 56 Saturday 85 97 Sunday 67 103

a. Find the mean and median for the number of accidents for builtup roads.

b. Find the mean and median of the number of accidents for nonbuiltup roads.

c. If you had a list of only the day of the week for each accident, what day would be the modal day for each type of road?

d. What might explain the difference in the modal days for the two types of roads?

In each of Exercises 3.30–3.33,

a. find n.

b. compute xi .

c. determine the sample mean. Round your answer to one more decimal place than that used for the observations.