condition mean min max ZT0-3 34.8746 34.8746 34.8746 ZT4-7 45.0839 45.0839 45.0839 ZT8-11 67.23134999999999 67.23134999999999 67.23134999999999 ZT12-15 52.146249999999995 52.146249999999995 52.146249999999995 ZT16-19 39.43445 39.43445 39.43445 ZT20-23 24.3714 24.3714 24.3714