MathematicsMedium89×since 2002Q5496Let α,β∈R\alpha, \beta \in \mathbf{R}α,β∈R. Let the mean and the variance of 6 observations −3,4,7,−6,α,β-3,4,7,-6, \alpha, \beta−3,4,7,−6,α,β be 2 and 23, respectively. The mean deviation about the mean of these 6 observations is :A163\frac{16}{3}316B113\frac{11}{3}311C143\frac{14}{3}314D133\frac{13}{3}313Check answerSkip