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Mean & Standard Deviation of Grouped Data

Last updated 2/4/2019
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Grouped data is data in a quantitative frequency distribution. In working problems like these, you need to remember to use both the class frequencies and the class midpoints when computing the answer. These problems are based on data from pages 738, 739, 744 and 747 of Mario Triola, "Elementary Statisitcs", 12th edition, Pearson Education, Inc., 2014.