condition mean min max ZT0-3 83.88425 83.88425 83.88425 ZT4-7 75.89115000000001 75.89115000000001 75.89115000000001 ZT8-11 77.54645 77.54645 77.54645 ZT12-15 79.5051 79.5051 79.5051 ZT16-19 69.5194 69.5194 69.5194 ZT20-23 79.33595 79.33595 79.33595