condition mean min max ZT0-3 159.10420000000002 159.10420000000002 159.10420000000002 ZT4-7 324.7273 324.7273 324.7273 ZT8-11 283.82793333333336 283.82793333333336 283.82793333333336 ZT12-15 233.2456 233.2456 233.2456 ZT16-19 188.3874 188.3874 188.3874 ZT20-23 198.7648 198.7648 198.7648