Ningbo Kou

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Questions related from Ningbo Kou

How to conduct validity tests with multiple scales within one questionnaire?

I am conducting research on the effects of residential environments on mental, physical, and social health. In my questionnaire, mental, physical, and social health are measured by three separate...

11 January 2024 3,617 2 View

How to handle questions with IF conditions in linear regression?

Forgive me if I may not have been standard in my formulation of the question. I wish to analyze the effect of residential environmental factors on depression through linear regression. In the...

06 December 2023 5,314 2 View

In linear regression, can the interaction term prove that an independent variable has a further effect on the dependent variable?

In linear regression, the dependent variable depression is affected by the independent variable "living in the countryside", B is a positive number, indicating that people living in the...

05 August 2023 6,602 3 View

In robustness test, whether a variable that was initially insignificant but becomes significant after adding control variables can explain conclusion?

When doing linear regression, in order to ensure the robustness of the model, I first included only key variables, but at this time some key variables did not pass the significance test. And when...

24 May 2023 5,833 3 View

In regression, the results of variables are different as a whole and when they are separated, how should the conclusion be drawn?

I was doing a regression on the relationship between time living in the rural and depression, and when I included time living in the regression as an overall variable, the p was significant and...

20 May 2023 7,493 11 View

Can multiple linear regression models and ridge regression models be compared?

I am currently comparing multiple multiple linear regression models to examine the impact of living environments on happiness levels in different regions. However, one of the models exhibits a...

18 May 2023 5,374 0 View

In linear regression, does the dependent variable have to be normally distributed?

I saw some statistical analysis articles mention that linear regression requires the dependent variable to remain normally distributed. However, when I performed a linear regression with the...

25 April 2023 4,462 22 View

In hierarchical linear regression, what is the amount of change in R-squared that indicates the new model fits better than the old model?

I am researching the impact of living experiences on depression. In model 1, only personal characteristic variables were included. Model 2 added three living experience variables on the basis of...

25 March 2023 2,032 5 View

When linear regression considers the interaction, what to do when both variables have negative numbers after standardize?

When performing linear regression, if the interaction is considered, in order to prevent multicollinearity, it is necessary to standardize the interactive variables and then multiply the two...

17 February 2023 6,929 2 View

Why is the result of regression analysis of all samples significant, but after dividing the samples, all analyzes are no longer significant?

I'm doing a regression analysis of the effect of housing type on resident depression. When I included all samples in a single model, housing type had a significant effect on depression (p=0.000)....

03 February 2023 5,106 4 View