Table 2.
Standard deviations of 10 sub-samples (3 parallel examinations) of a house-dust sample with low load in the 63-μm fraction in cfu/g × 1,000 (DG18, 25°C).
| Number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | Mean | % TCC | SD | SD% |
| Asp. | 12 | 13 | 8 | 8 | 9 | 9 | 6 | 11 | 7 | 8 | 9.1 | 51 | 2.2 | 25 |
| Peni. | 6 | 3 | 3 | 2 | 5 | 1 | 2 | 5 | 1 | 7 | 3.5 | 20 | 2.1 | 61 |
| Clad. | 5 | 0 | 2 | 1 | 5 | 5 | 1 | 0 | 3 | 1 | 2.3 | 13 | 2.1 | 89 |
| Wall. | 2 | 0 | 0 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0.6 | 3 | 0.8 | 141 |
| Aureo. pu. | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0.1 | 1 | 0.3 | 316 |
| Muc. | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 1 | 0.3 | 316 |
| Fusa. | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0.1 | 1 | 0.3 | 316 |
| Myc. st. | 1 | 3 | 4 | 3 | 1 | 6 | 2 | 0 | 0 | 1 | 2.1 | 12 | 1.9 | 91 |
| TCC | 26 | 19 | 18 | 15 | 20 | 24 | 13 | 16 | 11 | 17 | 17.9 | 100 | 4.6 | 26 |
SD- Standard deviation, SD% - relative percent standard deviation, % TCC- percent proportion of total colony count