condition mean min max ZT0-3 57.66655 45.7596 65.7781 ZT4-7 63.128150000000005 63.128150000000005 63.128150000000005 ZT8-11 55.26585 55.26585 55.26585 ZT12-15 72.957225 57.064800000000005 88.84965 ZT16-19 102.4982 102.4982 102.4982 ZT20-23 68.12424999999999 68.12424999999999 68.12424999999999