Let X1,X2,X3,⋯Xn be n observations and let ¯¯¯¯¯X be the arithmetic mean and σ2 be the variance. Statement 1: Variance of 2X1,2X2,....,2Xn is 4σ2 Statement 2: Arithmetic mean of 2X1,2X2,2X3,......,2Xn is 4¯¯¯¯¯X
Let x1, x2, ⋯,xn be n observations, and let ¯x be their arithmetic mean and σ2 be the variance. Statement – 1: Variance of 2x1,2x2,⋯,2xn is 4σ2 Statement – 2: Arithmetic mean 2x1,2x2,⋯,2xn is 4¯x