Feature

Sample mean

Sample standard deviation

i = 1

i = 2

i = 3

i = 1

i = 2

i = 3

k = 1

5.1

5.9

6.6

0.35

0.51

0.63

k = 2

3.4

2.8

3

0.38

0.31

0,32

k = 3

1.5

4.3

5.6

0.17

0.46

0.55

k = 4

0.2

1.3

2.1

0.11

0.2

0.27