condition mean min max ZT0-3 25.052500000000002 21.073050000000002 29.031950000000002 ZT4-7 25.155250000000002 25.155250000000002 25.155250000000002 ZT8-11 15.62215 15.62215 15.62215 ZT12-15 0 0 0 ZT16-19 42.35845 42.35845 42.35845 ZT20-23 42.27415 42.27415 42.27415