condition mean min max ZT0-3 0.13282731666666667 0.1260337 0.13962093333333334 ZT4-7 0.12343900000000001 0.12343900000000001 0.12343900000000001 ZT8-11 0.012220799999999999 0.012220799999999999 0.012220799999999999 ZT12-15 0.0199142 0.0 0.0398284 ZT16-19 0.014003799999999999 0.014003799999999999 0.014003799999999999 ZT20-23 0.0571854 0.0571854 0.0571854