condition mean min max ZT0-3 841.419443 841.419443 841.419443 ZT4-7 548.248108 548.248108 548.248108 ZT8-11 275.82891900000004 275.82891900000004 275.82891900000004 ZT12-15 424.553579 424.553579 424.553579 ZT16-19 348.72501950000003 348.72501950000003 348.72501950000003 ZT20-23 563.8201385 563.8201385 563.8201385