condition mean min max ZT0-3 0.893975 0.41191500000000003 1.52118 ZT4-7 0.4055165 0.4055165 0.4055165 ZT8-11 0.8218759999999999 0.8218759999999999 0.8218759999999999 ZT12-15 0.6093770000000001 0.164644 1.05411 ZT16-19 0.3727065 0.3727065 0.3727065 ZT20-23 0.448897 0.448897 0.448897