condition mean min max ZT0-3 154.172177 154.172177 154.172177 ZT4-7 189.3474415 189.3474415 189.3474415 ZT8-11 182.35987899999998 182.35987899999998 182.35987899999998 ZT12-15 239.5443625 239.5443625 239.5443625 ZT16-19 168.899802 168.899802 168.899802 ZT20-23 134.0655515 134.0655515 134.0655515