CK-12 Foundation
Ck 12: Statistics: Applications of Histograms
[Free Registration/Login may be required to access all resource tools.] Use calculators to create graphical representations of data, such as histograms.
Shodor Education Foundation
Shodor Interactivate: Normal Distribution
Change the standard deviation of an automatically generated normal distribution to create a new histogram. Observe how well the histogram fits the curve, and how areas under the curve correspond to the number of trials.