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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.
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 |