condition mean min max ZT0-3 175.935044 175.935044 175.935044 ZT4-7 181.87765100000001 181.87765100000001 181.87765100000001 ZT8-11 221.98143 221.98143 221.98143 ZT12-15 220.351568 220.351568 220.351568 ZT16-19 221.901245 221.901245 221.901245 ZT20-23 192.57365199999998 192.57365199999998 192.57365199999998