condition mean min max ZT0-3 34.7 34.7 34.7 ZT4-7 54.4 54.4 54.4 ZT8-11 37.35 37.35 37.35 ZT12-15 61.8 61.8 61.8 ZT16-19 36.35 36.35 36.35 ZT20-23 37.900000000000006 37.900000000000006 37.900000000000006