condition mean min max ZT0-3 38.152366666666666 25.769350000000003 51.44335 ZT4-7 21.98635 21.98635 21.98635 ZT8-11 26.4432 26.4432 26.4432 ZT12-15 63.05135 55.9794 70.1233 ZT16-19 58.936099999999996 58.936099999999996 58.936099999999996 ZT20-23 67.64914999999999 67.64914999999999 67.64914999999999