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Normal Curves and Histograms

Move the "size" slider to select a new sample size.
Move the "seed" slider to select a new set of data.
Move the "class" slider to choose a different number of classes.

Decide whether or not the data is normally distributed by
comparing the histogram to the normal curve graphed over it.

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The applet computes the mean and standard deviation of the data values shown in the dot plot, and then graphs a normal curve with the same mean and standard deviation on top of the graph of the histogram.

The normal curve has been multiplied by a factor so that its maximum y-value matches the largest frequency of the histogram.

David Gurney, Created with GeoGebra