condition mean min max ZT0-3 0.0293604 0.0293604 0.0293604 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.02681705 0.02681705 0.02681705 ZT16-19 0.0 0.0 0.0 ZT20-23 0.01755465 0.01755465 0.01755465