condition mean min max ZT0-3 680.451491 680.451491 680.451491 ZT4-7 499.670123 499.670123 499.670123 ZT8-11 489.890581 489.890581 489.890581 ZT12-15 593.5388459999999 593.5388459999999 593.5388459999999 ZT16-19 589.80898 589.80898 589.80898 ZT20-23 650.3796525 650.3796525 650.3796525