condition mean min max ZT0-3 2.74672148125 1.540423989 3.9530189735 ZT4-7 3.998567746 2.948208843 5.048926649 ZT8-11 6.9685512415 6.690722554 7.246379929 ZT12-15 4.50338651425 3.4089454495 5.5978275790000005 ZT16-19 4.46665946675 4.364294756 4.5690241775 ZT20-23 4.537576361499999 4.333389867999999 4.741762855