Samples

= SF_IN_I/N

Density of pores 10⁴

Standard deviation s

Confidence interval

Ech 2080

11.90

2.88

7.83

11.90 ± 7.83

Ech 3070

12.67

2.77

5.55

12.67 ± 5.55

Ech 4060

12.09

2.07

5.35

12.09 ± 5.35

Ech 5050

12.58

2.28

6.25

12.58 ± 6.25

Ech 6040

13.20

1.93

6.63

13.20 ± 6.63

Ech 7030

13.85

1.93

5.42

13.85 ± 5.42

Ech 8020

13.85

1.38

6.30

13.08 ± 6.3