condition mean min max ZT0-3 21.55405 21.55405 21.55405 ZT4-7 30.5601 30.5601 30.5601 ZT8-11 13.86365 13.86365 13.86365 ZT12-15 11.72485 11.72485 11.72485 ZT16-19 13.38375 13.38375 13.38375 ZT20-23 16.1445 16.1445 16.1445