condition mean min max ZT0-3 1.50945 1.50945 1.50945 ZT4-7 0.223978 0.223978 0.223978 ZT8-11 1.5207305 1.5207305 1.5207305 ZT12-15 4.496995 4.496995 4.496995 ZT16-19 6.134975 6.134975 6.134975 ZT20-23 6.73137 6.73137 6.73137