Idiot\'s Guides Basic Math and Pre-Algebra

334 Appendix B

121. 
     

     Range = 30 – 6 = 24.

     
     


122. 
     

     Median = 18.

     
     


123. 
     

     First quartile = 14. Third quartile = 26.

     
     


124. 
     

     Mean =
     6112114116116118120122126128130
     11
     208
     11
     5 18.9

     
     


125. 
     

     Standard deviation } 7. 23.
     Data Data – Mean (Data – Mean)^2
     6-12.9 166.64
     12 -6.9 47.74
     14 - 4.9 24.10
     16 -2.9 8 .4 6
     18 - 0.9 0.83
     20 1.1 1.19
     22 3.1 9.55
     26 7.1 50.28
     28 9.1 82.64
     30 11.1 123.01
     Sum of the squared deviations: 522.91
     Divided by 10: z 10 = 52.291
     Square root: 52.291 72.3

     
     


126. 
     

     According to the graph, the percent of
     adults smoking cigarettes showed an
     increase from about 1990 to 1996 with the
     sharpest increase from 1995 to 1996.

     
     


127. 
     

     According to the graph, the percent
     of adults smoking cigarettes remained
     relatively constant from 1985 to 1990.

     
     


128. 
     

Based on the circle graph, 18% + 15% = 33%

of people said their favorite food was a fruit

or vegetable.

Favorite Thanksgiving Food

Turkey

17%

Sweet

Potatoes

18%

Cranberries

15%

Pumpkin Pie

28%

Dressing

22%

4

3.5

3

2.5

2

1.5

1

0.5

0

Jobs Growth in Selected U.S. Cities

Percent of Growth

PhoenixTuscon

Sacramento

Fort Lauderdale

OrlandoAtlantaBoiseOmaha

AlbuquerqueLas Vegas

PortlandAustinFort Worth

Salt Lake City

116. Albuquerque and Fort
     Worth appear to have
     had the lowest rate of
     job growth.


117. Three cit ies —Boise,
     Las Vegas, and
     Austin—appear to have
     job growth rates above
     2.5%.