The time needed to complete a final examination in a particular college course is normally distributed with
Question:
The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Answer the following questions.
a. What is the probability of completing the exam in one hour or less?
b. What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes?
c. Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time?
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a P z 2 0228 So P x 60 0228 b At x 60 Area to left is 0228 At x ...View the full answer
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Related Book For 
Essentials Of Statistics For Business And Economics
ISBN: 9781305081598
7th Edition
Authors: David Anderson, Thomas Williams, Dennis Sweeney, Jeffrey Cam
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