condition mean min max ZT0-3 130.07883333333334 109.3355 166.046 ZT4-7 135.3395 135.3395 135.3395 ZT8-11 133.2235 133.2235 133.2235 ZT12-15 126.62200000000001 111.5695 141.67450000000002 ZT16-19 119.095 119.095 119.095 ZT20-23 108.08 108.08 108.08