condition mean min max ZT0-3 299.45966 299.45966 299.45966 ZT4-7 200.180298 200.180298 200.180298 ZT8-11 156.986428 156.986428 156.986428 ZT12-15 164.750056 164.750056 164.750056 ZT16-19 263.2683085 263.2683085 263.2683085 ZT20-23 285.207214 285.207214 285.207214