condition mean min max ZT0-3 0.7312205 0.5779725 0.8844685 ZT4-7 0.476244 0.476244 0.476244 ZT8-11 0.059958 0.059958 0.059958 ZT12-15 0 0 0 ZT16-19 0.6960124999999999 0.6960124999999999 0.6960124999999999 ZT20-23 0.5840165 0.5840165 0.5840165