condition mean min max ZT0-3 108.924365 108.924365 108.924365 ZT4-7 63.8975605 63.8975605 63.8975605 ZT8-11 77.8697145 77.8697145 77.8697145 ZT12-15 108.3767575 108.3767575 108.3767575 ZT16-19 144.3386915 144.3386915 144.3386915 ZT20-23 186.79315150000002 186.79315150000002 186.79315150000002