condition mean min max ZT0-3 117.969692 117.969692 117.969692 ZT4-7 64.4523415 64.4523415 64.4523415 ZT8-11 72.122536 72.122536 72.122536 ZT12-15 95.0782515 95.0782515 95.0782515 ZT16-19 74.48253 74.48253 74.48253 ZT20-23 89.0143585 89.0143585 89.0143585