condition mean min max ZT0-3 1.1206040000000002 1.1206040000000002 1.1206040000000002 ZT4-7 0.975653 0.975653 0.975653 ZT8-11 0.9096355 0.9096355 0.9096355 ZT12-15 0.8311455000000001 0.8311455000000001 0.8311455000000001 ZT16-19 1.0328300000000001 1.0328300000000001 1.0328300000000001 ZT20-23 0.9563575 0.9563575 0.9563575