condition mean min max ZT0-3 424.847441 424.847441 424.847441 ZT4-7 368.91301350000003 368.91301350000003 368.91301350000003 ZT8-11 343.51728 343.51728 343.51728 ZT12-15 380.04249949999996 380.04249949999996 380.04249949999996 ZT16-19 394.2736885 394.2736885 394.2736885 ZT20-23 399.6504905 399.6504905 399.6504905