nes to the mean and variance of the population. μ = Σχ/Ν (1+2+3+4+5) / 5 Illustration/Solution (1) Steps 3.00 1. (a) X-M 2. (2) 02 = E(X- ) / N = 10 / 5 = 2 (a) 1 2 3 4 5 O (b)(X - ) 4 1 O 1 4 E(x- u)2=10 (b). 2 So, the variance of the population is 2. Use the formula (3) NC. = NI n!(N-n)! Here N-5 and n=2. 3. 10 SC2 4. 2.5 So, there are 10 possible samples of size 2 that can be drawn. (4) Samples 1,2 (4) Mean 1.5 1,3 2.0 1.4 1,5 3.0 2,3 2.5 2.4 3.0 2.5 3.5 3.5 3,5 4.0 4.5 3,4 4,5