condition mean min max ZT0-3 117.640995 117.640995 117.640995 ZT4-7 122.7976635 122.7976635 122.7976635 ZT8-11 161.3990875 161.3990875 161.3990875 ZT12-15 148.891522 148.891522 148.891522 ZT16-19 139.3557135 139.3557135 139.3557135 ZT20-23 100.472715 100.472715 100.472715