condition mean min max ZT0-3 181.295584925 173.33770980000003 189.25346005 ZT4-7 333.775809175 285.60451585 381.9471025 ZT8-11 817.7142979 673.1227395 962.3058563000001 ZT12-15 1604.053484 1567.028221 1641.078747 ZT16-19 1292.086727675 1058.91507185 1525.2583835 ZT20-23 633.4640561 541.5086606499999 725.4194515500001