condition mean min max ZT0-3 4819.048458 4819.048458 4819.048458 ZT4-7 5103.426685 5103.426685 5103.426685 ZT8-11 4404.5508445 4404.5508445 4404.5508445 ZT12-15 4698.444386 4698.444386 4698.444386 ZT16-19 3294.7459595 3294.7459595 3294.7459595 ZT20-23 2534.474379 2534.474379 2534.474379