condition mean min max ZT0-3 166.985 166.985 166.985 ZT4-7 56.52305 56.52305 56.52305 ZT8-11 186.0005 186.0005 186.0005 ZT12-15 719.575 719.575 719.575 ZT16-19 1039.947 1039.947 1039.947 ZT20-23 519.9395 519.9395 519.9395