condition mean min max ZT0-3 1.4851349999999999 1.159665 1.9789999999999999 ZT4-7 2.315365 2.315365 2.315365 ZT8-11 2.277375 2.277375 2.277375 ZT12-15 5.529775 5.18666 5.87289 ZT16-19 3.566275 3.566275 3.566275 ZT20-23 2.873535 2.873535 2.873535