condition mean min max ZT0-3 11.623850000000001 11.623850000000001 11.623850000000001 ZT4-7 7.30907 7.30907 7.30907 ZT8-11 11.53975 11.53975 11.53975 ZT12-15 12.4534 12.4534 12.4534 ZT16-19 8.35543 8.35543 8.35543 ZT20-23 10.93375 10.93375 10.93375