The following set indicate the score obtained by a sample of 20 respondents on a life satisfaction scale. 1 1 1 2 2 3 1 2 2 3 3 2 2 2 2 1 1 3 1 1 6 8 9 6 1 0 4 0 3 3 3 0 5 8 7 8 6 5 6 8 calculate mean and media calculate the variance calculate the variance ss, variance and standard deviation for the following population of n=8 scores scores : 0,0, 5, 0, 3, 0, 0, 4