condition mean min max ZT0-3 10.558900000000001 10.558900000000001 10.558900000000001 ZT4-7 15.17695 15.17695 15.17695 ZT8-11 11.3246 11.3246 11.3246 ZT12-15 18.69575 18.69575 18.69575 ZT16-19 9.780325000000001 9.780325000000001 9.780325000000001 ZT20-23 10.61795 10.61795 10.61795