condition mean min max ZT0-3 0.7423255000000001 0.7423255000000001 0.7423255000000001 ZT4-7 1.78775 1.78775 1.78775 ZT8-11 1.132361 1.132361 1.132361 ZT12-15 1.6367699999999998 1.6367699999999998 1.6367699999999998 ZT16-19 2.249125 2.249125 2.249125 ZT20-23 0.6874865 0.6874865 0.6874865