condition mean min max ZT0-3 11.3355 11.3355 11.3355 ZT4-7 8.460180000000001 8.460180000000001 8.460180000000001 ZT8-11 9.845659999999999 9.845659999999999 9.845659999999999 ZT12-15 11.66025 11.66025 11.66025 ZT16-19 13.31155 13.31155 13.31155 ZT20-23 11.57405 11.57405 11.57405