Histogram Applet

This applet is designed to teach students how bin widths (or the
number of bins) affect a histogram. The histogram below is for the
Old Faithful data set. The observations are the duration (in minutes)
for eruptions of the Old Faithful
geyser in Yellowstone National Park. Students should interactively
change the bin width by dragging the arrow underneath the bin width
scale. For large bin widths, the bimodal nature of the dataset is
hidden, and for small bin widths the plot reduces to a spike at each
data point. What bin width do you think provides the best picture of
the underlying data?