condition mean min max ZT0-3 18.24455 18.24455 18.24455 ZT4-7 12.5506 12.5506 12.5506 ZT8-11 10.258455000000001 10.258455000000001 10.258455000000001 ZT12-15 9.76756 9.76756 9.76756 ZT16-19 13.016 13.016 13.016 ZT20-23 20.41225 20.41225 20.41225