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Pages A1-A12 11/09/2008 19:14:00 Statistical Methods and Measurement Descriptive Statistics Stats provide a shorthand description of large amts of data. Descriptive data sets – statements that summarize a lot of data Frequency Distributions o Frequency Distribution – grouping data so that it is comprehensible o Class Interval – an interval in which scores are grouped o Frequency Histogram – most widely used graph form. Constructed by drawing bars, bases of which are given by class intervals and heights of which are determined by the corresponding
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Unformatted text preview: class frequencies. o Frequency Polygon alternate way of presenting frequency distributions. Constructed by plotting the class frequencies at the center of the class interval and connecting the points obtained by straight lines. Measures of Central Tendency o Measure of Central Tendency a representative point on the scale. A central point that summarizes important info about the data such as mean, median and mode. 11/09/2008 19:14:00 11/09/2008 19:14:00...
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