condition mean min max ZT0-3 5.603746666666666 2.32728 10.129204999999999 ZT4-7 5.80977 5.80977 5.80977 ZT8-11 4.530245 4.530245 4.530245 ZT12-15 4.583975000000001 4.43369 4.73426 ZT16-19 2.321425 2.321425 2.321425 ZT20-23 6.435285 6.435285 6.435285