condition mean min max ZT0-3 48.214974999999995 44.307199999999995 52.12275 ZT4-7 20.47125 20.47125 20.47125 ZT8-11 9.373255 9.373255 9.373255 ZT12-15 0 0 0 ZT16-19 18.26053 18.26053 18.26053 ZT20-23 35.67705 35.67705 35.67705