condition mean min max ZT0-3 96.07158333333334 51.4517 173.8985 ZT4-7 329.749 329.749 329.749 ZT8-11 308.8325 308.8325 308.8325 ZT12-15 159.11900000000003 139.8615 178.37650000000002 ZT16-19 146.135 146.135 146.135 ZT20-23 51.600750000000005 51.600750000000005 51.600750000000005