condition mean min max ZT0-3 58.429246 58.429246 58.429246 ZT4-7 44.4998075 44.4998075 44.4998075 ZT8-11 52.879385 52.879385 52.879385 ZT12-15 111.079185 111.079185 111.079185 ZT16-19 83.3238935 83.3238935 83.3238935 ZT20-23 120.57069050000001 120.57069050000001 120.57069050000001