a) Measurements were taken on three variables ????1, ????2and ????3
1 9 2 6 5 8
2 12 8 6 4 10
3 3 4 0 2 1
(i) Determine the data matrix. (3 Marks)
(ii) Using the data matrix, calculate the mean vector (5 Marks)
(iii)Determine the variance-covariance matrix. (6 Marks)
(iv)Determine the sample correlation matrix hence interpret its elements. (6 Marks)