Friday, December 11, 2009

Normal Distributions

Normal Distributions are "theory and practice", they are frequently polygons and histograms.

Characteristics of Normal Distributions:
*Theoretical(approximation)*
*Symmetry about the mean*
*Follows the rule - 68-95-99.7*
*mean=median=mode*
Ways to figure out Normal Distributions:
*www.ronblond.com-Gr.12-areas under the normal distribution/x&z values*
*Graphing calculator: 2nd-vars-normal cdf-low value, high value, mean, standard deviation*

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