condition mean min max ZT0-3 3999.3500000000004 3999.3500000000004 3999.3500000000004 ZT4-7 4502.6 4502.6 4502.6 ZT8-11 4754.200000000001 4754.200000000001 4754.200000000001 ZT12-15 5176.299999999999 5176.299999999999 5176.299999999999 ZT16-19 4571.6 4571.6 4571.6 ZT20-23 4050.4 4050.4 4050.4