condition mean min max ZT0-3 10.77084 2.71808 18.8236 ZT4-7 21.9769 21.9769 21.9769 ZT8-11 30.1244 30.1244 30.1244 ZT12-15 0 0 0 ZT16-19 16.0592 16.0592 16.0592 ZT20-23 16.15205 16.15205 16.15205