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Unformatted text preview: Next, add the two middle scores and divide by 2: (3+4)/2 = 3.5 Mode = 4 10. Mean = [(5*2) + (4*5) + (3*3) + (2*2) + (1*2)]/14= (10+20+9+4+2)/14 = 45/14 = 3.21 Median = 1 1 2 2 3 3 3 4 4 4 4 4 5 5 (3+4)/2 = 3.5 Mode = 4 20. Sample 1: n 1 = 4, X 1 = 8 X 1 = X 1 / n 1 8 = X 1 / 4 X 1 = 32 Sample 2: n 2 = 6, X 2 = 12 X 2 = X 2 / n 2 12 = X 2 / 6 X 2 = 72 weighted mean = (X 1 + X 2 )/ n 1 + n 2 = (32 + 72)/6 + 4 = 10.4...
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 Fall '07
 Lewin

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