condition mean min max ZT0-3 185.078211 185.078211 185.078211 ZT4-7 214.06583899999998 214.06583899999998 214.06583899999998 ZT8-11 237.4067835 237.4067835 237.4067835 ZT12-15 178.8826505 178.8826505 178.8826505 ZT16-19 170.3824995 170.3824995 170.3824995 ZT20-23 164.4412235 164.4412235 164.4412235