Relative Frequency
the ratio of the number of observations in a statistical category to the total number of observations.
cumulative frequency
the frequency of all data values that are less than or equal to a given value.
relative proportion
using a single unit or part of the subject matter to measure other parts.
dotplot
A one dimensional plot of a quantitative data set where each value in the data set is represented by a dot above its corresponding location on the x axis.
skewness
A measure of whether a probability distribution is symmetrical.