condition mean min max ZT0-3 54.96678 54.96678 54.96678 ZT4-7 36.445443499999996 36.445443499999996 36.445443499999996 ZT8-11 36.6060025 36.6060025 36.6060025 ZT12-15 51.771217 51.771217 51.771217 ZT16-19 68.040232 68.040232 68.040232 ZT20-23 80.37392249999999 80.37392249999999 80.37392249999999