condition mean min max ZT0-3 1.0811119385 1.020989632 1.1412342450000001 ZT4-7 1.4672690722500001 1.42802205 1.5065160945 ZT8-11 0.73887506275 0.5465806034999999 0.931169522 ZT12-15 0.65469508275 0.496221128 0.8131690375 ZT16-19 1.2801052985 0.920522152 1.639688445 ZT20-23 2.2035919697499997 1.989547403 2.4176365365