condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 1.040705 1.040705 1.040705 ZT12-15 0.5079605 0.064456 0.951465 ZT16-19 0.0 0.0 0.0 ZT20-23 0.370772 0.370772 0.370772