Organizing and Displaying Data

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Presentation transcript:

Organizing and Displaying Data Chapter 2 Organizing and Displaying Data

A rank order distribution presents a quick view of group variability.

Larger data sets can be organized into a simple frequency distribution.

A grouped frequency should be divided into approx. 15 groups. Interval = range/15

A histogram is constructed from a grouped frequency distribution

A frequency polygon is a line graph of the scores plotted the frequency.

Cumulative Frequency: number of scores below a given score.

A cumulative frequency graph shows the number of scores at or below a given score.

The normal curve is symmetrical, with mean, median & mode at the same score.