condition mean min max ZT0-3 10.6737 10.6737 10.6737 ZT4-7 9.161915 9.161915 9.161915 ZT8-11 9.28199 9.28199 9.28199 ZT12-15 11.1555 11.1555 11.1555 ZT16-19 14.3253 14.3253 14.3253 ZT20-23 11.46325 11.46325 11.46325