condition mean min max ZT0-3 10.152875 10.152875 10.152875 ZT4-7 8.099720000000001 8.099720000000001 8.099720000000001 ZT8-11 7.469625000000001 7.469625000000001 7.469625000000001 ZT12-15 9.166355 9.166355 9.166355 ZT16-19 10.749375 10.749375 10.749375 ZT20-23 10.760100000000001 10.760100000000001 10.760100000000001