condition mean min max ZT0-3 0.2824395415 0.0 0.564879083 ZT4-7 2.88146461075 1.9328001719999999 3.8301290495 ZT8-11 7.32352377525 5.650855813 8.9961917375 ZT12-15 12.24009980425 9.177115299499999 15.303084309 ZT16-19 5.4139585345 4.883699271999999 5.944217797 ZT20-23 2.75229290275 2.183759099 3.3208267065