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Table 3 Standard deviations of 10 sub-samples (3 parallel examinations) of a house-dust sample in the 63-μm fraction in cfu/g × 10,000 (DG18, 25°C).

From: Evaluation of errors and limits of the 63-μm house-dust-fraction method, a surrogate to predict hidden moisture damage

Number

1

2

3

4

5

6

7

8

9

10

Mean

% TCC

SD

SD%

Aspergillus

12

7

8

8

7

10

15

11

8

6

9

34

3

29

Penicillium

5

4

5

2

4

3

3

7

4

4

4

15

2

35

Cladosporium

10

6

8

6

7

8

5

5

6

7

7

24

2

24

Alternaria

2

5

3

2

4

3

3

3

2

2

3

10

1

39

Other

5

4

3

4

3

4

4

3

5

9

5

16

2

36

TCC

35

26

28

21

25

28

29

30

25

28

28

100

4

13

  1. SD- Standard deviation, SD% - relative percent standard deviation, % TCC- percent proportion of total colony count