condition mean min max ZT0-3 42.54195 41.7855 43.2984 ZT4-7 34.845150000000004 34.845150000000004 34.845150000000004 ZT8-11 104.5265 104.5265 104.5265 ZT12-15 0 0 0 ZT16-19 105.60365000000002 105.60365000000002 105.60365000000002 ZT20-23 69.6263 69.6263 69.6263