condition mean min max ZT0-3 0.026081874999999997 0.0 0.052163749999999995 ZT4-7 0.1068481 0.1068481 0.1068481 ZT8-11 0.05344925 0.05344925 0.05344925 ZT12-15 0 0 0 ZT16-19 0.1216705 0.1216705 0.1216705 ZT20-23 0.3674665 0.3674665 0.3674665