Educator

Histograms, Cumulative Frequency Plots

• Graphs are used to identify a distribution’s center, spread, clusters of data, gaps in the data, and shape.

• Histograms can be used with frequencies, relative frequencies, and densities.

• If drawing a histogram by hand, there should be no gaps between the classes unless no observations are in that class.

• Cumulative frequency plots are always non-increasing.