condition mean min max ZT0-3 10.53932 10.53932 10.53932 ZT4-7 9.58692 9.58692 9.58692 ZT8-11 9.089295 9.089295 9.089295 ZT12-15 9.2264345 9.2264345 9.2264345 ZT16-19 10.0465525 10.0465525 10.0465525 ZT20-23 8.8240455 8.8240455 8.8240455