condition mean min max ZT0-3 10.141265 10.141265 10.141265 ZT4-7 9.894613 9.894613 9.894613 ZT8-11 9.815311000000001 9.815311000000001 9.815311000000001 ZT12-15 10.543895 10.543895 10.543895 ZT16-19 10.3616385 10.3616385 10.3616385 ZT20-23 10.353829 10.353829 10.353829