A company has ten sales territories with approximately the same number of sales people working in each territory. Last month the sales orders (in thousands of S) achieved were as follows: Area E Sales 150 130 140 150 140 For these sales data calculate the following: F 300 G 110 H 120 140 120 (i) (ii) (iii) (iv) (v) (vi) (vii) mean range lower quartile upper quartile quartile deviation variance and standard deviation mean deviation