condition mean min max ZT0-3 11.311203 11.311203 11.311203 ZT4-7 11.311203 11.311203 11.311203 ZT8-11 11.444092999999999 11.444092999999999 11.444092999999999 ZT12-15 12.584154000000002 12.584154000000002 12.584154000000002 ZT16-19 10.8368835 10.8368835 10.8368835 ZT20-23 10.647895 10.647895 10.647895