condition mean min max ZT0-3 13.738000000000001 11.549150000000001 15.926850000000002 ZT4-7 7.400345 7.400345 7.400345 ZT8-11 4.416544999999999 4.416544999999999 4.416544999999999 ZT12-15 0 0 0 ZT16-19 7.15665 7.15665 7.15665 ZT20-23 8.657689999999999 8.657689999999999 8.657689999999999