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If x_1,x_2,…….,x_nbe the observed data such that underset(i=1) overset(n) sum x_i -2n =180 and underset(i=1) overset(n) sumx_i =7n =30,then the mean of the data (x_1-3), (x_2-3), …. (x_n-3)is equal to |
| Answer» ANSWER :A | |