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5.75 5.75-6.85= -1.1 (-1.1)2= 1.21 6.0 6.0-6.85= -0.85 (-0.85)2 = 0.7225 6.5 6.5-6.85= -0.35 (-0.35)2 = 0.1225 7.75 7.75-6.85= 0.9 (0.9)2 = 0.81 8.25 8.25-6.85=
5.75 5.75-6.85= -1.1 (-1.1)2= 1.21 6.0 6.0-6.85= -0.85 (-0.85)2 = 0.7225 6.5 6.5-6.85= -0.35 (-0.35)2 = 0.1225 7.75 7.75-6.85= 0.9 (0.9)2 = 0.81 8.25 8.25-6.85= 1.4 (1.4)2 = 1.96 Variance = [(X-M)2/(n-1)] = [sum of all the squared deviations/(degrees of freedom)] Variance = 1.21+0.7225+0.1225+0.81+1.96= 4.825/ (5-1) Variance = 4.825/4 Variance = 1.20625
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Prealgebra
Authors: Elayn Martin Gay
7th edition
321955048, 978-0321955043
