condition mean min max ZT0-3 519.0379190250001 438.18935810000005 599.88647995 ZT4-7 540.296921325 471.86153659999997 608.73230605 ZT8-11 174.26462579499997 92.481145225 256.04810636499997 ZT12-15 29.969971994250002 23.230107125 36.7098368635 ZT16-19 80.94726489499999 73.049113045 88.845416745 ZT20-23 76.544380455 67.397647505 85.691113405