condition mean min max ZT0-3 1.0991335 1.040817 1.1574499999999999 ZT4-7 0.421574 0.421574 0.421574 ZT8-11 1.4712749999999999 1.4712749999999999 1.4712749999999999 ZT12-15 0 0 0 ZT16-19 1.8643635 1.8643635 1.8643635 ZT20-23 1.2512945 1.2512945 1.2512945