condition mean min max ZT0-3 0.6082725 0.6034235 0.6131215 ZT4-7 0.6920875 0.6920875 0.6920875 ZT8-11 0.387538 0.387538 0.387538 ZT12-15 0 0 0 ZT16-19 1.88454 1.88454 1.88454 ZT20-23 1.97283 1.97283 1.97283