the normal distribution containing a single peak and two tails
bell curve
symmetrical distribution containing multiple peaks
bimodal distribution
asymmetric distribution in which one of the two tails is disproportionately longer than the other
skew
the widths of class intervals
bin widths
useful for identifying outliers and comparing distributions
box plot
the ratio of the size of the effect shown in a graph to the size of the effect shown in the data
lie factor
useful when your data are not too numerous
stem-and-leaf displays
method for displaying the shape of a distribution that is useful with a large number of observations
histogram
method for displaying the shape of a distribution that is helpful for comparing sets of data
frequency polygons