condition mean min max ZT0-3 89.425096 89.425096 89.425096 ZT4-7 87.436698 87.436698 87.436698 ZT8-11 107.239353 107.239353 107.239353 ZT12-15 94.7972465 94.7972465 94.7972465 ZT16-19 142.2672755 142.2672755 142.2672755 ZT20-23 163.64410850000002 163.64410850000002 163.64410850000002