condition mean min max ZT0-3 9.031272 9.031272 9.031272 ZT4-7 10.089 10.089 10.089 ZT8-11 9.557573999999999 9.557573999999999 9.557573999999999 ZT12-15 10.1432395 10.1432395 10.1432395 ZT16-19 10.0311225 10.0311225 10.0311225 ZT20-23 9.302437000000001 9.302437000000001 9.302437000000001