In a study investigating the effect of car speed on accident severity, 5000reports of fatal automobile accidents were examined, and the vehiclespeed at impact was recorded for each one. For these 5000 accidents, theaverage speed was 42 mph and the standard deviation was 15 mph. Ahistogram revealed that the vehicle speed at impact distribution wasapproximately normal. a. Approximately what proportion of these vehicle speeds werebetween 27 and 57 mph? b. Approximately what proportion of these vehicle speedsexceeded 57 mph?
In a study investigating the effect of car speed on accident severity, 5000reports of fatal automobile accidents were examined, and the vehiclespeed at impact was recorded for each one. For these 5000 accidents, theaverage speed was 42 mph and the standard deviation was 15 mph. Ahistogram revealed that the vehicle speed at impact distribution wasapproximately normal. a. Approximately what proportion of these vehicle speeds werebetween 27 and 57 mph? b. Approximately what proportion of these vehicle speedsexceeded 57 mph?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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In a study investigating the effect of car speed on accident severity, 5000
reports of fatal automobile accidents were examined, and the vehicle
speed at impact was recorded for each one. For these 5000 accidents, the
average speed was 42 mph and the standard deviation was 15 mph. A
histogram revealed that the vehicle speed at impact distribution was
approximately normal.
a. Approximately what proportion of these vehicle speeds were
between 27 and 57 mph?
b. Approximately what proportion of these vehicle speeds
exceeded 57 mph?
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