é

{ { {

f the time actually spent the time needed

1 2

3 4 2

6 1 4 W

R P = 100 N

M = x + x + x + x 1 2 3 n N

X S = Σ 2 N 12 + 9 + 7 + 16 + 4 + 17 + 2 M = 7 = 9.57 ΣX 2 S = N ( 12 9. 57) + ( 9 9. 57) + ( 7 9. 57) + + ( 2 9. 57) = 7 = 5. 31 2 2 2 2 Z = X X S Z X X S

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