condition mean min max ZT0-3 2.3918850000000003 2.3918850000000003 2.3918850000000003 ZT4-7 0.0 0.0 0.0 ZT8-11 1.23284 1.23284 1.23284 ZT12-15 1.99722 1.99722 1.99722 ZT16-19 6.618265 6.618265 6.618265 ZT20-23 2.626405 2.626405 2.626405