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
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question

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

Show calculations on how you determined your answer

 

Expert Solution
Step 1: Define the variable

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

steps

Step by step

Solved in 3 steps with 5 images

Blurred answer
Similar questions
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman