Ch 2.2 Histograms, Frequency Polygons, and Ogives

Histogram

A graph that displays the data by using contiguous vertical bars (unless the frequency of a class is 0) of various heights to represent the frequencies of the classes

Frequency Polygon

A graph that displays the data by using lines that connect points plotted for the frequencies at the midpoints of the classes. The frequencies are represented by the heights of the points.

Ogive

A graph that represents the cumulative frequencies for the classes in a frequency distribution

Relative Frequency Graphs

Types of graphs where its distributions can be converted to distributions using proportions instead of raw data as frequencies. used when the the proportion of data values that fall into a given class is more important than the actual number of data values that fall into that class.