condition mean min max ZT0-3 5.106025000000001 4.091335 6.120715000000001 ZT4-7 8.057735000000001 8.057735000000001 8.057735000000001 ZT8-11 5.85458 5.85458 5.85458 ZT12-15 0 0 0 ZT16-19 5.47291 5.47291 5.47291 ZT20-23 9.075679999999998 9.075679999999998 9.075679999999998