condition mean min max ZT0-3 57.19955 57.19955 57.19955 ZT4-7 35.773399999999995 35.773399999999995 35.773399999999995 ZT8-11 34.578500000000005 34.578500000000005 34.578500000000005 ZT12-15 60.4197 60.4197 60.4197 ZT16-19 77.55095 77.55095 77.55095 ZT20-23 73.59375 73.59375 73.59375