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Frequently Used Statistics Formulas and Tables
www.hagerstowncc.eduupper limit + lower limit Class Midpoint = 2 Chapter 3 sample size population size frequency n N f sum w weight = = = Σ= = Sample mean: Population mean: () Weighted mean: Mean for frequency table: highest value + lowest value Midrange 2 x x n x N wx x w f x x f µ ∑ = ∑ = ∑• = ∑ ∑• = ∑ = 2 2 2 2 Range = Highest value - Lowest ...