condition mean min max ZT0-3 116.071898 116.071898 116.071898 ZT4-7 139.6278615 139.6278615 139.6278615 ZT8-11 127.195461 127.195461 127.195461 ZT12-15 107.3489265 107.3489265 107.3489265 ZT16-19 139.092089 139.092089 139.092089 ZT20-23 173.939818 173.939818 173.939818