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Students time to finish their homework is approximately normal with a mean of 80 minutes and a standard deviation of 20 minutes. If students are given one hour to complete the exam, what's the proportion of students who don't complete the exam?  1. - 0.6423 2. - 0.1593 3. - 0.3418 4. - 0.5000 5. - 0.8413

Students time to finish their homework is approximately normal with a mean of 80 minutes and a standard deviation of 20 minutes. If students are given one hour to complete the exam, what's the proportion of students who don't complete the exam?  1. - 0.6423 2. - 0.1593 3. - 0.3418 4. - 0.5000 5. - 0.8413

MATLAB: An Introduction with Applications
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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Students time to finish their homework is approximately normal with a mean of 80 minutes and a standard deviation of 20 minutes. If students are given one hour to complete the exam, what's the proportion of students who don't complete the exam? 

1. - 0.6423

2. - 0.1593

3. - 0.3418

4. - 0.5000

5. - 0.8413

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Step 1: Define the variable

Suppose the random variable x defines the time to finish the exam.

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