condition mean min max ZT0-3 43.391025 40.144400000000005 46.637649999999994 ZT4-7 42.44825 42.44825 42.44825 ZT8-11 51.126450000000006 51.126450000000006 51.126450000000006 ZT12-15 0 0 0 ZT16-19 53.0069 53.0069 53.0069 ZT20-23 66.2189 66.2189 66.2189