condition mean min max ZT0-3 92.508425 81.03935000000001 103.97749999999999 ZT4-7 104.00365 104.00365 104.00365 ZT8-11 20.07505 20.07505 20.07505 ZT12-15 0 0 0 ZT16-19 93.9786 93.9786 93.9786 ZT20-23 129.938 129.938 129.938