Suppose that scores on an exam are normally distributed with mean 80 and standard deviation 5, and that scores are not rounded (i.e. can be any real number between 0 and 100). a) What is the probability that a student scores higher th
Suppose that scores on an exam are normally distributed with mean 80 and standard deviation 5, and that scores are not rounded (i.e. can be any real number between 0 and 100). a) What is the probability that a student scores higher th
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
Related questions
Question
Suppose that scores on an exam are
a) What is the
Choice 1 of 5:0.16
Choice 2 of 5:0.21
Choice 3 of 5:0.56
Choice 4 of 5:0.68
Choice 5 of 5:0.84
b) What is the probability that a student scores between 70 and 90?
Choice 1 of 5:0.5
Choice 2 of 5:0.68
Choice 3 of 5:0.75
Choice 4 of 5:0.95
Choice 5 of 5:0.997
c) Assume that exam scores are independent and that 10 students take the exam. What is the probability that 4 or more students score 85 or higher on the exam?
Choice 1 of 5:0.02
Choice 2 of 5:0.05
Choice 3 of 5:0.06
Choice 4 of 5:0.12
Choice 5 of 5:0.68
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