Math

StatisticsEssentials of Statistics for the Behavioral SciencesInformation from the Department of Motor Vehicles indicates that the average age of licensed drivers is μ = 45.7 years with a standard deviation of σ = 12.5 years. Assuming that the distribution of drivers’ ages is approximately normal, a. What proportion of licensed drivers are older than 50 years old? b. What proportion of licensed drivers are younger than 30 years old?BuyFind*launch*

8th Edition

Frederick J Gravetter + 1 other

Publisher: Cengage Learning

ISBN: 9781133956570

Chapter 6, Problem 18P

Textbook Problem

Information from the Department of Motor Vehicles indicates that the average age of licensed drivers is μ = 45.7 years with a standard deviation of σ *=* 12.5 years. Assuming that the distribution of drivers’ ages is approximately normal,

**a.**What proportion of licensed drivers are older than 50 years old?**b.**What proportion of licensed drivers are younger than 30 years old?

Essentials of Statistics for the Behavioral Sciences

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