1.

For two data sets X and Y, each of size 5, the means are given to be 2 and 4 and the corresponding variances are 4 and 5, respectively. The variance of the combined data set is

Answer»

For two data sets X and Y, each of size 5, the means are given to be 2 and 4 and the corresponding variances are 4 and 5, respectively. The variance of the combined data set is



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