condition mean min max ZT0-3 9.858155 9.723695 9.992615 ZT4-7 10.584145 10.584145 10.584145 ZT8-11 10.29167 10.29167 10.29167 ZT12-15 0 0 0 ZT16-19 9.93814 9.93814 9.93814 ZT20-23 10.400580000000001 10.400580000000001 10.400580000000001