Then the mean number (to the nearest whole number) of students who will finish the exam in less than 1 hour for 12 students randomly selected is equal to:

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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The time taken by a student to finish a statistics exam can be modeled using the following
cumulative distribution function:
F(x) = 1 - e-0.9x
x>0
Suppose that the time taken for a student to finish the exam is constant from student to
student.
Then the mean number (to the nearest whole number) of students who will finish the exam
in less than 1 hour for 12 students randomly selected is equal to:
8
None of the other options
7
Transcribed Image Text:The time taken by a student to finish a statistics exam can be modeled using the following cumulative distribution function: F(x) = 1 - e-0.9x x>0 Suppose that the time taken for a student to finish the exam is constant from student to student. Then the mean number (to the nearest whole number) of students who will finish the exam in less than 1 hour for 12 students randomly selected is equal to: 8 None of the other options 7
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