Hi I did surveys on pre-teens, teens, 20s (3 "columns") and need to find signfifiance (p-value). What test do I use? I keep trying Chi square on graphpad prism 5, but I keep getting the message
Analysis of Contingency Table: Overview
Chi-square calculations are only valid when all expected
values are greater than 1.0 and at least 20% of the expected
values are greater than 5. These conditions have not been
met, and thus the chi-square calculations are not valid. To
avoid this problem, combine two or more rows or columns.
What do they mean "combine" I can't just combine three columns of data, so is there a better test I can use? Thank you.
Analysis of Contingency Table: Overview
Chi-square calculations are only valid when all expected
values are greater than 1.0 and at least 20% of the expected
values are greater than 5. These conditions have not been
met, and thus the chi-square calculations are not valid. To
avoid this problem, combine two or more rows or columns.
What do they mean "combine" I can't just combine three columns of data, so is there a better test I can use? Thank you.