Use the data to compute the probability that a motorcyclist wears a DOT-compliant helmet.
Use the data to compute the probability that a motorcyclist wears a DOT-compliant helmet.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
![Use the data to compute the probability that a motorcyclist wears a DOT-compliant helmet.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F703a50ff-8f5d-40ba-8eea-f13205fb216a%2F7467af80-c9cd-4752-ba0f-8ddfda1398b7%2F4ap6t6s_processed.png&w=3840&q=75)
Transcribed Image Text:Use the data to compute the probability that a motorcyclist wears a DOT-compliant helmet.
![The National Occupant Protection Use Survey (NOPUS) was conducted to provide probability-
based data on motorcycle helmet use in the United States. The survey was conducted by sending
observers to randomly selected roadway sites where they collected data on motorcycle helmet use,
including the number of motorcyclists wearing a Department of Transportation (DOT)-compliant
helmet (National Highway Traffic Safety Administration website, January 7, 2010). Sample data
consistent with the most recent NOPUS are shown below. Answer questions 8 -10.
Type of Helmet
DOT-
Region
Compliant
Noncompliant
Northeast
96
62
Midwest
86
43
South
92
49
West
76
16
Total
350
170
(Hint: The above table is a cross-tabulation, but the right margin is missing. You will need to
calculate the total number of motorcyclists for each region as well as the total number of
motorcyclists of all four regions.)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F703a50ff-8f5d-40ba-8eea-f13205fb216a%2F7467af80-c9cd-4752-ba0f-8ddfda1398b7%2Fw2p2if_processed.png&w=3840&q=75)
Transcribed Image Text:The National Occupant Protection Use Survey (NOPUS) was conducted to provide probability-
based data on motorcycle helmet use in the United States. The survey was conducted by sending
observers to randomly selected roadway sites where they collected data on motorcycle helmet use,
including the number of motorcyclists wearing a Department of Transportation (DOT)-compliant
helmet (National Highway Traffic Safety Administration website, January 7, 2010). Sample data
consistent with the most recent NOPUS are shown below. Answer questions 8 -10.
Type of Helmet
DOT-
Region
Compliant
Noncompliant
Northeast
96
62
Midwest
86
43
South
92
49
West
76
16
Total
350
170
(Hint: The above table is a cross-tabulation, but the right margin is missing. You will need to
calculate the total number of motorcyclists for each region as well as the total number of
motorcyclists of all four regions.)
Expert Solution
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Step 1
It is given that
Number of motorcyclist wears a DOT-compliant helmet = 350
Total motorcyclist = 350 + 170 = 520
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