Table 13 The extreme variance analysis table of factors affecting \(\sigma\).

From: Study on the foam production characteristics of air self-suction foam generator by jet

Horizontal total value, mean, range, and range order

\({m}\)

\({\ell}\)/cm

\({n}\)

\(\varphi\)

\(\mu\)/cm

K1

18

23

27

25

27

K2

31

23

43

15

12

K3

21

24

-

30

31

k1

6.000

7.667

9.000

8.333

9.000

k2

10.333

7.667

14.333

5.000

4.000

k3

7.000

8.000

-

10.000

10.333

R

4.33

0.33

14.33

5.00

6.33

factors of primary and secondary importance

C > E > D > A > B

optimal combination

A2B3C2D3E3