condition mean min max ZT0-3 245.87519 245.87519 245.87519 ZT4-7 188.71128549999997 188.71128549999997 188.71128549999997 ZT8-11 222.703091 222.703091 222.703091 ZT12-15 230.329205 230.329205 230.329205 ZT16-19 200.565205 200.565205 200.565205 ZT20-23 168.572531 168.572531 168.572531