condition mean min max ZT0-3 17.79295 17.79295 17.79295 ZT4-7 14.88775 14.88775 14.88775 ZT8-11 14.105250000000002 14.105250000000002 14.105250000000002 ZT12-15 14.36825 14.36825 14.36825 ZT16-19 13.491150000000001 13.491150000000001 13.491150000000001 ZT20-23 16.27205 16.27205 16.27205