condition mean min max ZT0-3 855.85 855.85 855.85 ZT4-7 635.8 635.8 635.8 ZT8-11 556.0 556.0 556.0 ZT12-15 832.75 832.75 832.75 ZT16-19 868.0999999999999 868.0999999999999 868.0999999999999 ZT20-23 946.6500000000001 946.6500000000001 946.6500000000001