1) For output on question 3, 4, 5, do we need to include age group into independent variable?
Although the instruction states that only first session outcome score and number of sessinos needs to be added, I was thinking perhaps the age group was left out.
2) If a variable is significant (p=.02) but the R2 of the scatterplot is almost close to zero (R2=.006), should the variable be left out of the model since the R2 is weak?
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4 comments:
1) You have to include age if the question says that age is part of the model. If not, you don't have to.
2)When we're talking about significance level, no matter how small the R2 or F ratio or other inferential statistics are, the p value determines whether or not your model is significantly different (statistically) from the null model.
In addition to the response to your first question, it looks like the first instruction applies to question 1-2; and, the second instruction, which comes right after question 2, applies to question 3-5. I will double check with Dr. Kim and I will post up something if I interpreted it incorrectly.
Just confirmed with Dr. Kim, the first instruction is for Q1-2, and the second instruction is for Q3-5.
Got it.
Thanx~
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