condition mean min max ZT0-3 14.49445 5.1738 21.62995 ZT4-7 10.3102 10.3102 10.3102 ZT8-11 5.3337 5.3337 5.3337 ZT12-15 2.890475 0.0 5.78095 ZT16-19 10.11554 10.11554 10.11554 ZT20-23 0.0 0.0 0.0