(a) Explain carefully why a useful graph must compare rates (accidents per driver) rather than counts of accidents in the four marijuana use classes. (b) Compute the accident rates in the four marijuana use classes. After you have done this, make a graph that displays the accident rate for each class. What do you conclude? (You should not conclude that marijuana use causes accidents because risk takers are more likely both to drive aggressively and to use marijuana.)

(a) Explain carefully why a useful graph must compare rates (accidents per driver) rather than counts of accidents in the four marijuana use classes. (b) Compute the accident rates in the four marijuana use classes. After you have done this, make a graph that displays the accident rate for each class. What do you conclude? (You should not conclude that marijuana use causes accidents because risk takers are more likely both to drive aggressively and to use marijuana.)

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter4: Polynomial And Rational Functions

Section4.6: Rational Functions

Problem 11SC: Find the mean hourly cost when the cell phone described above is used for 240 minutes.

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Question

1.40
stand what is happening.
FURSEALS
Marijuana and Traffic Accidents. Researchers in New
Zealand interviewed 907 drivers at age 21. They had
data on traffic accidents, and they asked the drivers
about marijuana use. Here are data on the numbers
of accidents caused by these drivers at age 19, broken
down by marijuana use at the same age:³
30
Accidents caused no
Drivers
41
Never
59
452
Marijuana Use per Year
11-50
Times
15
70
1-10
Times
36
229
51+
Times
50
156
(a) Explain carefully why a useful graph must compare
rates (accidents per driver) rather than counts of
accidents in the four marijuana use classes.
(b) Compute the accident rates in the four marijuana use
classes. After you have done this, make a graph that
displays the accident rate for each class. What do you
conclude? (You should not conclude that marijuana
use causes accidents because risk takers are more likely
both to drive aggressively and to use marijuana.)
Mobile shopping in the United States, Canada, and the
United Kingdom. The use of mobile devices to perform
financial transactions is steadily increasing as mobile
shoppers become more and more comfortable with

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Find the mean hourly cost when the cell phone described above is used for 240 minutes.
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