Sources

F_o

F_e

F_o − F_e

(F_o − F_e)²

(F_o − F_e)²/F_e

So much Strain on the Income

65

26.67

38.33

1469.2

55.1

A little strain on the income

5

26.67

−21.67

469.6

17.6

No strain on the Income

10

26.67

−16.67

277.9

10.4

TOTAL

80

83.1