Question

What is 1 standard deviation on a

normal curve?
A. Another name for the mean.
B. Another name for the inflection point.
C. The distance from the mean to the bottom of the
curve.
D. The distance from the mean to an inflection point.​

Answer 1

D. The distance from the mean to an inflection point

Explanation:

We rarely encounter the actual formula for the normal PDF. It is ...

`p(x)=(1)/(√(2\pi))e^{-(x^2)/(2)}`

In fact, the inflection points are at x = ±1, where the curve changes from being concave downward to concave upward.

So, one standard deviation is the distance from the mean to an inflection point.