condition mean min max ZT0-3 0.73063625 0.7133259999999999 0.7479465000000001 ZT4-7 0.568508 0.568508 0.568508 ZT8-11 0.239151 0.239151 0.239151 ZT12-15 0 0 0 ZT16-19 0.187056 0.187056 0.187056 ZT20-23 0.376392 0.376392 0.376392