condition mean min max ZT0-3 94.535975 73.8082 115.26374999999999 ZT4-7 341.777 341.777 341.777 ZT8-11 202.3145 202.3145 202.3145 ZT12-15 0 0 0 ZT16-19 125.3241 125.3241 125.3241 ZT20-23 184.6095 184.6095 184.6095