Dan Lee

6 Questions 7 Answers 0 Followers

Questions related from Dan Lee

How do I interpret an interaction term without significant marginal effects?

I estimated a multiple regression model with an interaction term. The interaction was statistically significant. However, when examining the Johnson-Neyman plot, the marginal effect (across all...

04 October 2019 1,771 0 View

How do you add percentages within a bar chart with 13 yes/no variables in the X-axis?

Hi, I have 13 survey items with the response options YES and NO. For example, the respondent may indicates YES or NO when asked if they have a reliable method of transportation. I would like to...

01 August 2019 3,953 3 View

How would you use standard deviations to weight averages?

Our response variable (Y) is a biomarker of stress that was measured three times (reliability check). Researchers in the field tend to take the average score of the observed score across 3...

07 July 2019 158 1 View

How to determine unidimensionality or multidimensionality from conflicting factor analysis results?

I am examining results from an exploratory factor analysis (using Mplus) and it seems like the two-factor solution fits the data better than the one factor solution (per the RMSEA, chi-square LRT,...

10 June 2019 4,338 7 View

How do you aggregate a data frame in R without dropping cases that are missing on some (but not all) variables?

I am trying to aggregate a large data set by two identification variables (i.e., id1 and id2). My aggregate command in R drops the entire row if missing a value on any of the columns. For...

06 June 2019 6,592 3 View

Is It OK to use Spearman Rho or Kendall Tau correlation when some categories on the Likert scale have zero count?

I would like to examine the association between two survey questions asked to doctors. The first question asks whether they screened their patients for social needs in the past year (e.g.,...

15 April 2019 7,829 3 View