condition mean min max ZT0-3 96.052325 84.75345 107.3512 ZT4-7 114.042 114.042 114.042 ZT8-11 84.30885 84.30885 84.30885 ZT12-15 0 0 0 ZT16-19 113.4705 113.4705 113.4705 ZT20-23 116.5765 116.5765 116.5765