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. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: J Aerosol Sci. 2015 Jul 1;85:30–41. doi: 10.1016/j.jaerosci.2015.03.001

Table 2.

P-values comparing the average RP values (ratio of particle number concentration while PIPER moving to concentration during reference period; Equations 1 and 2) for each size channel in carpeted homes versus average RP values in bare floor homes, for each sampler. P-values less than 0.05 are shown in bold.

Stationary sampler PIPER
0.3 to 0.5 μm 0.203 0.215
0.5 to 1.0 μm 1.000 0.683
1.0 to 2.5 μm 0.435 0.766
2.5 to 5.0 μm 0.330 0.103
5.0 to 10.0 μm 0.243 0.004
> 10.0 μm 0.081 0.001