condition mean min max ZT0-3 53.4755 50.363 56.588 ZT4-7 41.50635 41.50635 41.50635 ZT8-11 37.261250000000004 37.261250000000004 37.261250000000004 ZT12-15 0 0 0 ZT16-19 47.138149999999996 47.138149999999996 47.138149999999996 ZT20-23 43.89765 43.89765 43.89765