condition mean min max ZT0-3 11.062895000000001 11.062895000000001 11.062895000000001 ZT4-7 14.615300000000001 14.615300000000001 14.615300000000001 ZT8-11 23.68655 23.68655 23.68655 ZT12-15 21.362650000000002 21.362650000000002 21.362650000000002 ZT16-19 10.50357 10.50357 10.50357 ZT20-23 8.02733 8.02733 8.02733