condition mean min max ZT0-3 51.6229 51.6229 51.6229 ZT4-7 33.05 33.05 33.05 ZT8-11 34.525400000000005 34.525400000000005 34.525400000000005 ZT12-15 40.251850000000005 40.251850000000005 40.251850000000005 ZT16-19 49.72465 49.72465 49.72465 ZT20-23 60.889700000000005 60.889700000000005 60.889700000000005