(PLEASE HELP WITH 1 AND 2) 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 HelmetRegionDOT-CompliantNoncompliantNortheast9662Midwest8643South9249West 76 16Total350170 (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.) 1.Use the data to compute the probability that a motorcyclist wears a DOT-compliant helmet. 2. 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?

From given data we have : Type of Helmet Region DOT-Compliant Noncompliant…

Answered: The National Occupant Protection Use…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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(PLEASE HELP WITH 1 AND 2)

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
Region	DOT-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.)

1.Use the data to compute the probability that a motorcyclist wears a DOT-compliant helmet.

2. 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?

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