condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.020014383333333333 0.0 0.04002876666666667 ZT16-19 0.041827500000000004 0.041827500000000004 0.041827500000000004 ZT20-23 0.0 0.0 0.0