condition mean min max ZT0-3 0.3766235 0.077299 0.7700925 ZT4-7 0.2324675 0.2324675 0.2324675 ZT8-11 1.2119145 1.2119145 1.2119145 ZT12-15 0.84784725 0.7429395000000001 0.952755 ZT16-19 0.0 0.0 0.0 ZT20-23 0.2572385 0.2572385 0.2572385