Name Tuesday, 13 of May Monday, 12 of May average on Tuesday average for 7 days 1 day 57 ? 48 57 2-3 days 3 ? 1.2 3 4-7 days 1 ? 0.25 1 8-14 days 1 ? 1.2 1 15-31 days 1 ? 0.75 1 amount of selected 63 ? 52 63 total 63 ? 52 63