5. Is lack of sleep causing traffic fatalities? A study conducted under the auspices of the National Highway Traffic Safety Administration found that the average number of fatal crashes caused by drowsy drivers each year was 1550 (Business Week, January 26, 2015). Assume the annual number of fatal crashes per year is normally distributed with a standard deviation of 300 and a mean of 1550.

5. Is lack of sleep causing traffic fatalities? A study conducted under the auspices of the National Highway Traffic Safety Administration found that the average number of fatal crashes caused by drowsy drivers each year was 1550 (Business Week, January 26, 2015). Assume the annual number of fatal crashes per year is normally distributed with a standard deviation of 300 and a mean of 1550.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 13PPS

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Question

1. What is the probability of the number of fatal crashes will be between 1000 and 2000 for a year? 2. For a year to be in the top 2.5% of the distribution with respect to the number I’d fatal crashes, how many fatal crashes would have to occur?