PSYC 2520 Chapter Notes - Chapter 10: Interquartile Range, Statistical Hypothesis Testing, Frequency Distribution
1 Feb 2013
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Beginning behavioral research: a conceptual primer (7th ed. A frequency distribution shows the number of times that each score or other unit of observation occurs in a set of data. Typically a bar graph, line graph, or table. In a bar graph, the height of solid bars represents the number (frequency) of each score. The scale values are on the horizontal axis (x-axis or abscissa) The frequency is on the vertical axis (y-axis or ordinate) Bar graphs are especially useful for representing categories of responses and frequencies (or proportions) within these categories. Line graphs are an efficient way of graphing changes in the frequency (or proportion) of scores over time. In a stem-and-leaf chart, the original data are presented with any desired precision so that we can visually detect the symmetry, spread, and concentration of the batch as well as any outliers.
