condition mean min max ZT0-3 24.644387 24.644387 24.644387 ZT4-7 30.145392 30.145392 30.145392 ZT8-11 38.2543125 38.2543125 38.2543125 ZT12-15 92.4703105 92.4703105 92.4703105 ZT16-19 39.1915525 39.1915525 39.1915525 ZT20-23 105.469655 105.469655 105.469655