a). Final project prospectus due (one page or less).
b). In this assignment, explore the associations between Spring literacy achievement (C2RSCALE), non-parental childcare participation (P1CARNOW), and SES (WKSESQ5). Does the relationship between SES and literacy achievement depend on whether children attend daycare? Is the link between attending daycare and literacy achievement the same for students from all social backgrounds? Be sure to discuss the potential main effects and interaction. Rather than a table, create a graph to illustrate your findings.
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Sorry if this a repeat posting. I had an internet technology glitch with my last attempt to post.
When I took regression previously in the measurement department, I seem to remember Jane Monroe saying that I should not interpret main effects if I find an interaction.
On the other hand, Dr. Ready has asked us to report both main effects and interactions. I'm pretty sure the answer to the follow question no, but I just wanted to double-check...
Should I should conduct a Scheffe test and discuss the pattern of results for significant main effects in a two-way anova?
Yes, you should be reporting all three for ANOVA. Don't worry about the post-hocs.
There are a few differences between ANOVA and regression...For regression, you HAVE to interpret the main effect if there is an interaction. Maybe what Dr. Monroe meant was that in regression, you wouldn't interpret the interaction separately from the main effect - that is, it is not meaningful to interpret one without the other, if the interaction is significant. But if both are significant (and even if only one is, really) you would interpret both.
Good afternoon,
Martie and I were wondering about the output for Assign 8. We noticed that the output of the table displaying the r statistics will only show 1 or 2 astricks (*) -- even though on the output with the two-tailed significance, there are p-values < .001.
Why is there a difference? There is also a difference in the hand-out Doug gave us in class (where the table does not show p < .001).
Ariel and Martie
Ariel and Martie - I'm not sure why SPSS is not reporting significance (I'll have to do some more digging on that), but in any case, don't rely on SPSS stars on your output - just go by the p-value that it reports.
I'm not entirely sure what you mean by the last sentence about Doug's output, but let me know if this answer doesn't help....
Megan
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