1.Mean of nnn observations x1,x2,…,xnx_1, x_2, \ldots, x_nx1,x2,…,xn is xˉ\bar{x}xˉ. If an observation xqx_qxq is replaced by xq′x'_qxq′, then the new mean isa.xˉ−xq+xq′\displaystyle\bar{x} - x_q + x'_qxˉ−xq+xq′b.(n−1)xˉ+xq′n\displaystyle\frac{(n-1)\bar{x} + x'_q}{n}n(n−1)xˉ+xq′c.(n−1)xˉ−xq′n\displaystyle\frac{(n-1)\bar{x} - x'_q}{n}n(n−1)xˉ−xq′d.nxˉ−xq+xq′n\displaystyle\frac{n\bar{x} - x_q + x'_q}{n}nnxˉ−xq+xq′Login to continueOnly logged in users canattempt or see the solution.
