condition mean min max ZT0-3 187.4375 187.4375 187.4375 ZT4-7 218.7695 218.7695 218.7695 ZT8-11 115.76249999999999 115.76249999999999 115.76249999999999 ZT12-15 158.625 158.625 158.625 ZT16-19 129.5395 129.5395 129.5395 ZT20-23 140.96949999999998 140.96949999999998 140.96949999999998