condition mean min max ZT0-3 27.02475 27.02475 27.02475 ZT4-7 15.272000000000002 15.272000000000002 15.272000000000002 ZT8-11 29.611 29.611 29.611 ZT12-15 24.7151 24.7151 24.7151 ZT16-19 24.1541 24.1541 24.1541 ZT20-23 29.6103 29.6103 29.6103