0
Age of Employee (X)
% (y)
(x*y)
(x*x)
(20 - 30) 20
10
20 * 10 = 200
20 * 20 = 400
(30 - 40) 15
7.5
15 * 7.5 = 112.5
15 * 15 = 225
(40 - 50) 10
5
10 * 5 = 50
10 * 10 = 100
(50 - 60) 3
1.5
3 * 1.5 = 4.5
3 * 3 = 9
(60 - 65) 2
1
2 * 1 = 2
2 * 2 = 4
Σx = 50
Σy = 25
Σxy = 369
Σx2 = 738
(b) = (NΣXY - (ΣX)(ΣY)) / (NΣX2 - (ΣX)2)
(b) = ((5)*(75)-(50)*(25))/((5)*(369)-(50)2)
(b)= (375 - 1250) / (1845 - 2500)
(b) = 875/655
(b) = 1.4
(a) = (ΣY - b(ΣX)) / N
(a) = (25-1.4(50))/5
(a) = (25 - 40.5)/5
(a) = -3.1
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