condition mean min max ZT0-3 995.3058333333332 906.444 1096.985 ZT4-7 706.577 706.577 706.577 ZT8-11 420.47400000000005 420.47400000000005 420.47400000000005 ZT12-15 572.428 519.1315 625.7245 ZT16-19 441.722 441.722 441.722 ZT20-23 396.899 396.899 396.899