Chapter 2 - Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation
Pie Chart
a chart that shows the proportion or percentage that each class represents of the total number of frequencies
Histogram
a graph in which the classes are marked on the horizontal axis and the class frequencies on the vertical axis. The class frequencies are represented by the heights of the bars, and the bars are drawn adjacent to each other
Cumulative Frequency Polygon
a graph that consists of line segments connecting the points formed by the intersection of the class upper limit and the class cumulative frequency
Bar Chart
a graph that shows qualitative classes on the horizontal axis and the class frequencies on the vertical axis. The class frequencies are proportional to the heights of the bars
Cumulative Frequency Distribution
a grouping of data into mutually exclusive classes showing the number of observations at or below the upper limit of each class
Frequency Table
a grouping of qualitative data into mutually exclusive and collectively exhaustive classes showing the number of observations in each class
Frequency Distribution
a grouping of quantitative data into mutually exclusive and collectively exhaustive lasses showing the number of observations in each class
Frequency Polygon
shows the shape of a distribution and is similar to a histogram. It consists of line segments connecting the points formed by the intersections of the class midpoints and the class frequencies
Relative Class Frequency
shows what fraction each class is of the total number of observations
Class Frequency
the number of observations in each class
Class Midpoint
the point halfway between the lower limits of two consecutive classes
Class Interval
the size or width of the class