condition mean min max ZT0-3 2.52285 2.52285 2.52285 ZT4-7 1.317825 1.317825 1.317825 ZT8-11 2.29999 2.29999 2.29999 ZT12-15 4.193875 4.193875 4.193875 ZT16-19 5.60455 5.60455 5.60455 ZT20-23 4.15071 4.15071 4.15071