condition mean min max ZT0-3 0.6248469999999999 0.460318 0.789376 ZT4-7 0.969664 0.969664 0.969664 ZT8-11 1.300655 1.300655 1.300655 ZT12-15 0.67492575 0.492265 0.8575865 ZT16-19 0.4325393333333334 0.361365 0.5037136666666667 ZT20-23 0 0 0