Basic Mathematics for College Students

9. COMMUTING TIME A school district collected
   data on the number of minutes it took its employees
   to drive to work in the morning. The results are
   presented in the histogram below.
   a. How many employees have a commute time that
   is in the 7-to-10-minute range?
   b. How many employees have a commute time that
   is less than 10 minutes?
   c. How many employees have a commute that takes
   15 minutes or more each day?


10. VOLUNTEER SERVICE The number of hours
    served last month by each of the volunteers at a
    homeless shelter are listed below:
    46828101195125187519

a. Find the mean (average) of the hours of

volunteer service.

b. Find the median of the hours of volunteer

service.

c. Find the mode of the hours of volunteer

service.

11. RATING MOVIES Netflicks, a popular online DVD
    rental system, allows members to rate movies using a
    5-star system. The table below shows a tally of the
    ratings that a group of college students gave a movie.
    Find the mean (average) rating of the movie.

Comments Tally

Loved it

Really liked it

Liked it

Didn’t like it

Hated it

III

IIII

IIII

IIII I

II

Number of Stars

School District Employees’ Commute

10

2.5 6.5 10.5 14.5

Morning commute time (min)

18.5 22.5

20

30

40

Frequency 8

22

35

28

20

26.5

9

12. GPAs Find the semester grade point average for a
    student who received the following grades. Round to
    the nearest hundredth.


13. RATINGS The seven top-rated cable television
    programs for the week of March 30–April 5, 2009, are
    given below. What are the mean, median, and mode of
    the viewer data?


14. REAL ESTATE In May of 2009, the median sales
    price of an existing single-family home in the United
    States was $172,900. Explain what is meant by the
    median sales price. (Source: National Association of
    Realtors)

632 Chapter 7 Test

Course Grade Credits

WEIGHT TRAINING C 1

TRIGONOMETRY A 3

GOVERNMENT B 2

PHYSICS A 4

PHYSICS LAB D 1

Show/day/time/network Millions of viewers

WCW Raw,Mon. 10 P.M., USA 5.39

WCW Raw,Mon. 9 P.M., USA 4.99

NCIS,Tu e. 7 P.M., USA 4.25

NCIS,Wed. 7 P.M., USA 4.25

NCIS,Mon. 7 P.M., USA 4.04

Penguins of Madagascar, 4.02

Sun. 10 A.M., Nickelodeon

The O’Reilly Factor, 3.93

Wed. 8 P.M., Fox

Source: Bay Ledger News Zone