condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0101561 0.0101561 0.0101561 ZT8-11 0.012794383333333333 0.012794383333333333 0.012794383333333333 ZT12-15 0.01470895 0.01470895 0.01470895 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0111294 0.0111294 0.0111294