For each day of last year, the number of vehicles passing through a certain intersection was recorded by a city engineer. One objective of this study was to determine the percentage of days that more than 425 vehicles used the intersection. If the mean data was 375 vehicles per day and the standard deviation was 25 vehicles: (b) more than 425 vehicles used the intersection?

Answered: For each day of last year, the number…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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For each day of last year, the number of vehicles passing through a certain intersection was recorded by a city engineer. One objective of this study was to determine the percentage of days that more than 425 vehicles used the intersection. If the mean data was 375 vehicles per day and the standard deviation was 25 vehicles:

(b) more than 425 vehicles used the intersection?

Expert Solution

Step 1

Given,

$μ = 375 σ = 25$

Let X be the no. of vehicles passing through a certain intersection per day.

Since it is the study of entire population, therefore $X ~ N (μ = 375, σ = 25)$

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