increase in weight of the infants 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Xi 0.3 0.4 0.4 0.5 0.7 0.7 0.8 0.9 0.9 0.9 0.9 1.2 1.4 1.5 1.5 1.5 1.6 Xi - mean -0.78 -0.68 -0.68 -0.58 -0.38 -0.38 -0.28 -0.18 -0.18 -0.18 -0.18 0.13 0.33 0.43 0.43 0.43 0.53 (Xi - mean)^2 0.60 0.46 0.46 0.33 0.14 0.14 0.08 0.03 0.03 0.03 0.03 0.02 0.11 0.18 0.18 0.18 0.28 1.7 0.63 0.73 0.83 18 19 20 sum of values 21.5 0.39 0.53 0.68 4.86 mean of the data 1.075 0.24 1.8 1.9 The variance of the data is 0.24. By the variance we may say that plus 0.24kg weight is the difference between the weights of the ba ...
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