List of top Mathematics Questions on Statistics asked in CET Delhi Polytechnic

The most suitable measure of central tendancy is :
If \(\bar{x}_1, \bar{x}_2, \bar{x}_3, \dots, \bar{x}_n\) are the means of n groups with \(n_1, n_2, n_3, \dots, n_n\) numbers of observations respectively. Then the mean \(\bar{x}\) of all the groups taken together is given by :
The mean of 5 observations \(x, x+2, x+4, x+6\) and \(x+8\), is 11, then the value of x is :
If \(\bar{x}\) represent the mean of n observations \(x_1, x_2, x_3, \dots, x_n\), then the value of \(\sum_{i=1}^{n} (x_i - \bar{x})\) is :