Theory    Screen 1 (Q.1) Range    Screen 2 (Q. 2) Standard Deviation    Screen 3 (Q. 3, 4 & 5) Variance    Screen 4 (Q. 6)    Screen 5 (Q. 7 to 9) Mean Deviation    Screen 6 (Q. 10) Coefficient of Variation    Screen 7 (Q. 11)