condition mean min max ZT0-3 34.358853333333336 10.01666 53.93275 ZT4-7 9.912615 9.912615 9.912615 ZT8-11 17.5331 17.5331 17.5331 ZT12-15 13.572095 9.58269 17.5615 ZT16-19 31.7549 31.7549 31.7549 ZT20-23 39.313550000000006 39.313550000000006 39.313550000000006