№

${\overline{Y}}_u$

$Y_{Ru}$

$\left(Y_{Ru}-{\overline{Y}}_u\right)$

${\left(Y_{Ru}-{\overline{Y}}_u\right)}^2$

1

65

62.76

−2.24

5.01

2

67

71.76

4.8

22.7

3

42

50.26

8.3

68.25

4

60

59.26

−0.74

0.55

5

75

75.26

0.26

0.07

6

60

63.26

3.26

10.64

7

63

62.76

−0.24

0.06

8

52

50.76

−1.24

1.53

9

51

56.19

5.19

26.93

10

41

44.19

3.19

10.17

11

60

65.19

5.19

26.93

12

48

53.19

5.19

26.93