condition mean min max ZT0-3 37.027089 37.027089 37.027089 ZT4-7 147.3095305 147.3095305 147.3095305 ZT8-11 74.7151285 74.7151285 74.7151285 ZT12-15 61.6278545 61.6278545 61.6278545 ZT16-19 54.481971 54.481971 54.481971 ZT20-23 99.4672795 99.4672795 99.4672795