condition mean min max ZT0-3 72.96605 63.34585 82.58625 ZT4-7 16.79085 16.79085 16.79085 ZT8-11 13.55775 13.55775 13.55775 ZT12-15 0 0 0 ZT16-19 32.174 32.174 32.174 ZT20-23 63.9289 63.9289 63.9289