Introduction to Normal Distributions — Unit test Answers
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The set of life spans of an appliance is normally distributed with a mean = 48 months and a standard deviation = 8 months. What is the life span of an appliance that has a z-score of –3?
A
3 monthsB
24 monthsC
45 monthsD
72 months22
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What is the formula for margin of error?
A
ME =
B
ME =
C
ME =
D
ME =
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