A Normal density curve has which of the following properties?
A. It is symmetric.
B. It has a peak centered above its mean.
C. The spread of the curve is proportional to the standard ...
D. All of the above.
... has the following important characteristics: (1) the curve has a single peak; (2) it is bell-shaped; (3) the mean ... [ its mean and standard deviation ... standard normal density ... ...
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