The marks on the Math 1080 Unit 2 test were normally distributed with a mean of...
The marks on the Math 1080 Unit 2 test were normally distributed with a mean of 76.2% and a standard deviation of 7.32%. What is the score of a test that is 1.31 standard deviations above the mean?
Question 2 options:
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a) -66.61% |
|
|
b) 85.79% |
|
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c) 87.09% |
|
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d) 66.61% |
Homework Answers
z = X - Mean / SD
We have to calculate X such that
1.31 = X - 76.2 / 7.32
Solve for X
X = 85.79
The score of the test = 85.79%
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