condition mean min max ZT0-3 0.0120406 0.0120406 0.0120406 ZT4-7 0.058392650000000004 0.058392650000000004 0.058392650000000004 ZT8-11 0.0770991 0.0770991 0.0770991 ZT12-15 0.04128385 0.04128385 0.04128385 ZT16-19 0.0364432 0.0364432 0.0364432 ZT20-23 0.02172525 0.02172525 0.02172525