condition mean min max ZT0-3 11.222999999999999 11.222999999999999 11.222999999999999 ZT4-7 9.23763 9.23763 9.23763 ZT8-11 5.939465 5.939465 5.939465 ZT12-15 7.296735 7.296735 7.296735 ZT16-19 11.3363 11.3363 11.3363 ZT20-23 10.90995 10.90995 10.90995