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.)
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.)
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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Transcribed Image Text:The probability that a motorcyclist wore a DOT-compliant helmet five years ago was .48, and last
year this probability was .63. Would the National Highway Traffic Safety Administration be pleased
with the most recent survey results?
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.)
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