condition mean min max ZT0-3 135.11879628000003 128.54557720000003 141.69201536 ZT4-7 38.7331658075 28.223181385000004 49.24315023 ZT8-11 29.687072285 21.26278967 38.111354899999995 ZT12-15 63.941011415000006 59.191699255 68.69032357500001 ZT16-19 87.1683115925 86.181005705 88.15561748 ZT20-23 97.5083175225 97.26642188 97.75021316499999