condition mean min max ZT0-3 5.7040500000000005 4.814970000000001 6.59313 ZT4-7 4.93494 4.93494 4.93494 ZT8-11 5.443895 5.443895 5.443895 ZT12-15 0 0 0 ZT16-19 4.960285 4.960285 4.960285 ZT20-23 5.554625 5.554625 5.554625