condition mean min max ZT0-3 32.251221 32.251221 32.251221 ZT4-7 60.1806435 60.1806435 60.1806435 ZT8-11 87.07434 87.07434 87.07434 ZT12-15 84.3933685 84.3933685 84.3933685 ZT16-19 68.81430850000001 68.81430850000001 68.81430850000001 ZT20-23 69.3046615 69.3046615 69.3046615