condition mean min max ZT0-3 63.70315 63.70315 63.70315 ZT4-7 48.28795 48.28795 48.28795 ZT8-11 60.26905 60.26905 60.26905 ZT12-15 72.23025 72.23025 72.23025 ZT16-19 74.72245000000001 74.72245000000001 74.72245000000001 ZT20-23 56.878 56.878 56.878