1. Given the following data sets. Compute their mean,varianceand median: (5 point each)

a) { 5, 7, 2, 3, 1, 9, 5}

b) { 4, 2, 2, 1 , 2 , 1 , 4 , 1 , 4 , 5 , 8 }

c) { 3, 5 , -8 ,0 ,2 ,3, -1 }