condition mean min max ZT0-3 0.04599025 0.0 0.0919805 ZT4-7 0.1357895 0.1357895 0.1357895 ZT8-11 0.22972199999999998 0.22972199999999998 0.22972199999999998 ZT12-15 0 0 0 ZT16-19 0.362129 0.362129 0.362129 ZT20-23 0.0452141 0.0452141 0.0452141