condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 1.356725 1.356725 1.356725 ZT8-11 0.0 0.0 0.0 ZT12-15 0.39498 0.0 0.78996 ZT16-19 0.0 0.0 0.0 ZT20-23 2.251935 2.251935 2.251935