condition mean min max ZT0-3 81.54766666666667 62.017 98.57055 ZT4-7 50.0667 50.0667 50.0667 ZT8-11 62.50795 62.50795 62.50795 ZT12-15 87.74244999999999 85.23315 90.25175 ZT16-19 93.14125 93.14125 93.14125 ZT20-23 110.99600000000001 110.99600000000001 110.99600000000001