condition mean min max ZT0-3 0.27500800000000003 0.27500800000000003 0.27500800000000003 ZT4-7 0.5270715 0.5270715 0.5270715 ZT8-11 0.4460275 0.4460275 0.4460275 ZT12-15 0.451986 0.451986 0.451986 ZT16-19 0.643145 0.643145 0.643145 ZT20-23 0.857046 0.857046 0.857046