condition mean min max ZT0-3 9.55216 9.330770000000001 9.77355 ZT4-7 10.47115 10.47115 10.47115 ZT8-11 6.6041799999999995 6.6041799999999995 6.6041799999999995 ZT12-15 0 0 0 ZT16-19 9.176655 9.176655 9.176655 ZT20-23 11.395815 11.395815 11.395815