Step 2 Step3 Step4
Morning 0.92 (0.11) 0.79 (0.10) 0.62 (0.14)
Early afternoon 0.88 (0.07) 0.71 (0.08) 0.55 (0.13)
Early night 0.88 (0.10) 0.63 (0.11) 0.46 (0.15)
Table 1: Indoor/Outdoor mean ozone concentration ratios for 29 non-basement dwellings in Athens ([Ο3]in/[O3]out, Standard deviations are shown in parenthesis).