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

2.0667

4.2712

115.3224

Great Extent 4

24.2%

29

16

1.0667

1.1378

32.9962

Moderate Extent 3

2.5%

3

9

0.0667

0.0044

0.0132

Low Extent 2

25.8%

31

62

−0.9333

0.8710

27.001

Very Low Extent 1

25%

30

30

−1.9333

3.7376

112.128

Total

100%

120

352

287.4608