condition mean min max ZT0-3 0.12918965 0.08074595 0.19446950000000002 ZT4-7 0.077575 0.077575 0.077575 ZT8-11 0.9668965 0.9668965 0.9668965 ZT12-15 1.17404025 0.9080455000000001 1.440035 ZT16-19 0.4517935 0.4517935 0.4517935 ZT20-23 0.37559549999999997 0.37559549999999997 0.37559549999999997