condition mean min max ZT0-3 3.9913425 3.94298 4.039705 ZT4-7 3.596175 3.596175 3.596175 ZT8-11 3.202705 3.202705 3.202705 ZT12-15 0 0 0 ZT16-19 4.311265000000001 4.311265000000001 4.311265000000001 ZT20-23 4.596 4.596 4.596