condition mean min max ZT0-3 0.6322775 0.6322775 0.6322775 ZT4-7 0.6653785 0.6653785 0.6653785 ZT8-11 0.3836185 0.3836185 0.3836185 ZT12-15 0.951756 0.951756 0.951756 ZT16-19 0.7034050000000001 0.7034050000000001 0.7034050000000001 ZT20-23 0.875409 0.875409 0.875409