condition mean min max ZT0-3 318.772645 318.772645 318.772645 ZT4-7 307.99429250000003 307.99429250000003 307.99429250000003 ZT8-11 328.96389 328.96389 328.96389 ZT12-15 317.15071650000004 317.15071650000004 317.15071650000004 ZT16-19 366.6289175 366.6289175 366.6289175 ZT20-23 325.57160999999996 325.57160999999996 325.57160999999996