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Mathematics 21 Online
OpenStudy (konradzuse):

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 deviation. D. All of the above.

OpenStudy (konradzuse):

I say D

OpenStudy (anonymous):

explains it well with applet. and yes it is d

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