condition mean min max ZT0-3 60.6661870125 59.39499359 61.937380434999994 ZT4-7 98.9120700725 79.399461195 118.42467895000001 ZT8-11 156.77483465 136.85045780000002 176.6992115 ZT12-15 163.4919376675 146.36919053499997 180.6146848 ZT16-19 108.52647439 107.11652514999999 109.93642363000001 ZT20-23 93.981678435 89.57631186500001 98.387045005