Figure 3.

Boxplots of indoor OP_m^DTT during different perturbation experiments relative to indoor Background OP_m^DTT, where Background is from measurements in the empty house prior to any indoor experiments and only due to infiltration of outdoor air. The mean Background OP_m^DTT is indicated by the dashed line, and the shaded region represents its standard deviation. The two categories, pellet stove + incense and pellet stove + incense + outdoor car, with only one data point each, have comparable OP_m^DTT levels and have been merged (PS + Incense) in this plot. The marker and line in the box indicate the median value (Q2), the lower and upper box boundaries indicate the first quartile (Q1) and the third quartile (Q3), and the whiskers indicate the minimum and maximum values for each corresponding category.