What is the standard deviation
Every Normal model is defined by its parameters: the mean and the standard deviation.
Suppose that the mean ?= 20, and that 45% of the area is above 30. What is the standard deviation?
A) 60
B) 70
C) 80
D) 90
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Every Normal model is defined by its parameters: the mean and the standard deviation. Suppose that the mean ?= 20, and that 45% of the area is above 30. What is the standard deviation?
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