The mean and standard deviation of five observations $x_1,x_2,x_3,x_4,x_5$ and are 10 and 3 respectively, then variance of the observation $x_1,x_2,x_3,x_4,x_5,-50$ is equal to (a) 437.5 (b) 507.5 (c) 537.5 (d) 487.5

Views: 758 students