condition mean min max ZT0-3 242.5435 233.675 251.41199999999998 ZT4-7 51.703900000000004 51.703900000000004 51.703900000000004 ZT8-11 27.58005 27.58005 27.58005 ZT12-15 0 0 0 ZT16-19 32.16875 32.16875 32.16875 ZT20-23 24.451999999999998 24.451999999999998 24.451999999999998