condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.010324702666666666 0.0 0.020649405333333332 ZT12-15 0.0 0.0 0.0 ZT16-19 0.009931172 0.0 0.019862344 ZT20-23 0.0 0.0 0.0