Weights in Kilograms of 10 students are given below 38, 40, 45, 53, 47, 43, 55, 48, 52,49 Can we say that the variance of the distribution of weights of all students from which the above sample was drawn is equal to 20 square kgm ? Degrees of freedom x2 0 05 x2001 16.92 21.67 10 18.31 23 21

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