condition mean min max ZT0-3 9.85998 9.555109999999999 10.164850000000001 ZT4-7 8.642325 8.642325 8.642325 ZT8-11 9.68164 9.68164 9.68164 ZT12-15 0 0 0 ZT16-19 13.229099999999999 13.229099999999999 13.229099999999999 ZT20-23 10.198975 10.198975 10.198975