condition mean min max ZT0-3 22.511499999999998 22.511499999999998 22.511499999999998 ZT4-7 36.26245 36.26245 36.26245 ZT8-11 18.35305 18.35305 18.35305 ZT12-15 11.71655 11.71655 11.71655 ZT16-19 14.04005 14.04005 14.04005 ZT20-23 15.32705 15.32705 15.32705