Level of Agreement (x)

Proportion

f

xf

$\left(x-\overline{x}\right)$

${\left(x-\overline{x}\right)}^2$

${\left(x-\overline{x}\right)}^{2}f$

Very Great Extent 5

22.5%

27

135

1.9917

3.9669

107.1063

Great Extent 4

17.5%

21

84

0.9917

0.9835

20.6535

Moderate Extent 3

15.0%

18

54

−0.0083

0.0001

0.0000

Low Extent 2

28.3%

34

68

−1.0083

1.0167

1.0337

Very Low Extent 1

16.7%

20

20

−2.0083

4.0333

16.2675

Total

100%

120

361

145.061