condition mean min max ZT0-3 12.11496 12.11496 12.11496 ZT4-7 11.350683 11.350683 11.350683 ZT8-11 11.273299999999999 11.273299999999999 11.273299999999999 ZT12-15 10.175101 10.175101 10.175101 ZT16-19 10.931273000000001 10.931273000000001 10.931273000000001 ZT20-23 12.304052500000001 12.304052500000001 12.304052500000001