condition mean min max ZT0-3 45.324627 45.324627 45.324627 ZT4-7 56.646993 56.646993 56.646993 ZT8-11 91.3748965 91.3748965 91.3748965 ZT12-15 100.7243165 100.7243165 100.7243165 ZT16-19 61.6020595 61.6020595 61.6020595 ZT20-23 33.962843 33.962843 33.962843