condition mean min max ZT0-3 0.7673365 0.5928925 0.9080675 ZT4-7 0.510022 0.510022 0.510022 ZT8-11 0.49941 0.49941 0.49941 ZT12-15 0.58305275 0.4977895 0.668316 ZT16-19 0.8237035 0.8237035 0.8237035 ZT20-23 0.482524 0.482524 0.482524