condition mean min max ZT0-3 10.415972 10.415972 10.415972 ZT4-7 10.769822 10.769822 10.769822 ZT8-11 9.9922435 9.9922435 9.9922435 ZT12-15 9.7512495 9.7512495 9.7512495 ZT16-19 10.6288 10.6288 10.6288 ZT20-23 10.8835535 10.8835535 10.8835535