condition mean min max ZT0-3 5.9990625 5.424564999999999 6.5735600000000005 ZT4-7 4.4616050000000005 4.4616050000000005 4.4616050000000005 ZT8-11 5.18501 5.18501 5.18501 ZT12-15 0 0 0 ZT16-19 6.689155 6.689155 6.689155 ZT20-23 5.4069199999999995 5.4069199999999995 5.4069199999999995