condition mean min max ZT0-3 6548.0 6548.0 6548.0 ZT4-7 6782.6 6782.6 6782.6 ZT8-11 7049.2 7049.2 7049.2 ZT12-15 6789.549999999999 6789.549999999999 6789.549999999999 ZT16-19 5901.25 5901.25 5901.25 ZT20-23 4905.1 4905.1 4905.1