condition mean min max ZT0-3 59.12736666666667 29.7623 77.14609999999999 ZT4-7 29.85535 29.85535 29.85535 ZT8-11 30.91465 30.91465 30.91465 ZT12-15 50.919174999999996 45.32085 56.5175 ZT16-19 67.5392 67.5392 67.5392 ZT20-23 84.8982 84.8982 84.8982