condition mean min max ZT0-3 1.4417499999999999 1.4417499999999999 1.4417499999999999 ZT4-7 1.17963 1.17963 1.17963 ZT8-11 0.263447 0.263447 0.263447 ZT12-15 0.969745 0.969745 0.969745 ZT16-19 1.3070849999999998 1.3070849999999998 1.3070849999999998 ZT20-23 1.5220099999999999 1.5220099999999999 1.5220099999999999