condition mean min max ZT0-3 14.0441 14.0441 14.0441 ZT4-7 12.00155 12.00155 12.00155 ZT8-11 11.42675 11.42675 11.42675 ZT12-15 8.689865000000001 8.689865000000001 8.689865000000001 ZT16-19 16.2298 16.2298 16.2298 ZT20-23 17.3599 17.3599 17.3599