Name Thursday, 8 of May Wednesday, 7 of May average on Thursday average for 7 days 1 day 15 ? 12 15 2 days 1 ? 0.25 1 3-4 days 0 ? 0.5 0 5-7 days 1 ? 0.75 1 amount of selected 17 ? 14 17 total 17 ? 14 17