condition mean min max ZT0-3 26.305533333333333 14.016449999999999 32.48175 ZT4-7 12.0616 12.0616 12.0616 ZT8-11 11.88745 11.88745 11.88745 ZT12-15 14.123550000000002 13.695450000000001 14.55165 ZT16-19 22.596899999999998 22.596899999999998 22.596899999999998 ZT20-23 32.3375 32.3375 32.3375