SOC 3142 Chapter Notes - Chapter 4: Frequency Distribution, Cumulative Frequency Analysis
13 Jan 2017
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Document Summary
A picture really is worth a thousand words. Visually representing a distribution of scores as well as how to use different types of graphs to represent data. Frequency distribution: a method to tallying and representing how often certain score occur. Scores are usually grouped into class intervals, or range of numbers. Class interval: a range of numbers, and the first step in the creation of a frequency distribution is to define how large each interval will be. Histogram: a visual representation of the frequency distribution where the frequencies are represented by bars. A frequency polygon: a continuous line that represents the frequencies of scores within a class interval. Cumulative frequency distribution: based on the same data as a frequency distribution but with an added column. Start at the bottom, # of frequencies [ex. 1] cumulative frequency=1, next one # of frequencies [ex. 2] therefore the cumulative frequency is 3 [2+1] -- the one below it, add the occurrences.
