condition mean min max ZT0-3 502.970542 502.970542 502.970542 ZT4-7 1707.449227 1707.449227 1707.449227 ZT8-11 1330.0216775000001 1330.0216775000001 1330.0216775000001 ZT12-15 954.7705185 954.7705185 954.7705185 ZT16-19 790.674585 790.674585 790.674585 ZT20-23 646.313761 646.313761 646.313761