condition mean min max ZT0-3 98.461588 98.461588 98.461588 ZT4-7 80.7564415 80.7564415 80.7564415 ZT8-11 84.9620985 84.9620985 84.9620985 ZT12-15 115.13722849999999 115.13722849999999 115.13722849999999 ZT16-19 125.23650799999999 125.23650799999999 125.23650799999999 ZT20-23 124.79770350000001 124.79770350000001 124.79770350000001