condition mean min max ZT0-3 59.966 59.966 59.966 ZT4-7 42.642250000000004 42.642250000000004 42.642250000000004 ZT8-11 33.426199999999994 33.426199999999994 33.426199999999994 ZT12-15 39.4516 39.4516 39.4516 ZT16-19 65.90715 65.90715 65.90715 ZT20-23 65.69925 65.69925 65.69925