condition mean min max ZT0-3 9.668262 9.668262 9.668262 ZT4-7 9.661241 9.661241 9.661241 ZT8-11 9.179269999999999 9.179269999999999 9.179269999999999 ZT12-15 10.703748000000001 10.703748000000001 10.703748000000001 ZT16-19 9.430003 9.430003 9.430003 ZT20-23 10.5333845 10.5333845 10.5333845