Outlier, A number that is much higher or lower than the other scores in the data set., Mean, The mathematical average of a data set., Median, The middle number when numbers are in ascending order., Mode, The number that occurs most in a data set., Range, The highest score - the lowest score., Sample, A part of a population selected to be surveyed., Histogram, A column graph that shows the frequency of each score. The columns are joined together., Box plot, A diagram that represents the 5 number summary for a data set., First quartile, A number at the 25% of data when placed in ascending order., Third quartile, A number greater than 75% of the data when placed in ascending order.

Statistics - Terminology

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