condition mean min max ZT0-3 119.539749 119.539749 119.539749 ZT4-7 117.856716 117.856716 117.856716 ZT8-11 109.9203575 109.9203575 109.9203575 ZT12-15 133.9725635 133.9725635 133.9725635 ZT16-19 117.663546 117.663546 117.663546 ZT20-23 127.33842250000001 127.33842250000001 127.33842250000001