condition mean min max ZT0-3 17.213816666666666 13.150749999999999 20.43565 ZT4-7 14.8017 14.8017 14.8017 ZT8-11 10.47555 10.47555 10.47555 ZT12-15 13.4007 13.38725 13.41415 ZT16-19 11.72495 11.72495 11.72495 ZT20-23 17.63275 17.63275 17.63275