condition mean min max ZT0-3 20.870514 20.870514 20.870514 ZT4-7 20.244955 20.244955 20.244955 ZT8-11 24.531626000000003 24.531626000000003 24.531626000000003 ZT12-15 23.555656 23.555656 23.555656 ZT16-19 48.3947275 48.3947275 48.3947275 ZT20-23 35.8392815 35.8392815 35.8392815