condition mean min max ZT0-3 90.318975 83.79305 96.8449 ZT4-7 42.09255 42.09255 42.09255 ZT8-11 43.00575 43.00575 43.00575 ZT12-15 0 0 0 ZT16-19 58.9136 58.9136 58.9136 ZT20-23 58.21135 58.21135 58.21135