Lesson 2A Measures of Variation 501= Step-by-Step Solutions begin on page R1.
Extra Practice begins on page EP2.Examples 1 and 2 33 GOLF COURSES The table shows the number Number of Golf Courses
California 1,117
Florida 1,465
Georgia 513
Iowa 437
Michigan 1,038
New York 954
North Carolina 650
Ohio 893
South Carolina 456
Texas 1,018of golf courses in various states.
a. Find the range of the data.
b. Find the median and the upper and lower
quartiles.
c. Find the interquartile range.
d. Name any outliers in the data.- INTERNET The table shows the countries Millions of Internet Users
China 99.8
Germany 41.88
India 36.97
Japan 78.05
South Korea 31.67
United Kingdom 33.11
United States 185.55
with the most Internet users.
a. Find the range of the data.
b. Find the median and the upper and lower
quartiles.
c. Find the interquartile range.
d. Name any outliers in the data.Example 3 5. EXERCISE The table shows the number Minutes of Exercise
Week 1 Week 2
Tanika 45 30
Tasha 40 55
Tyrone 45 35
Uniqua 55 60
Videl 60 45
Wesley 90 75of minutes of exercise for each person.
Compare and contrast the measures of
variation for both weeks.- FOOTBALL The table Penalties By NFL Teams
NFC AFC
Dallas Cowboys 104 New England Patriots 78
Arizona Cardinals 137 Indianapolis Colts 67
Green Bay Packers 113 Jacksonville Jaguars 76
New Orleans Saints 68 San Diego Chargers 94
New York Giants 77 Cleveland Browns 114
Seattle Seahawks 59 Pittsburgh Steelers 80
Minnesota Vikings 86 Houston Texans 82
shows the top teams
in the National Football
Conference (NFC) and
the American Football
Conference (AFC).
a. Which conference had
a greater range of
penalties?
b. Find the measures of
variation for each conference.
c. Compare and contrast the measures of variation for each conference.498_509_C09_L2_895130.indd 501 1/11/10 9:34 AM