condition mean min max ZT0-3 77.21375 73.07345 81.35405 ZT4-7 30.92145 30.92145 30.92145 ZT8-11 16.0268 16.0268 16.0268 ZT12-15 0 0 0 ZT16-19 24.6815 24.6815 24.6815 ZT20-23 55.322050000000004 55.322050000000004 55.322050000000004