Zhaoyuan Li

4 Questions 4 Answers 0 Followers

Questions related from Zhaoyuan Li

How are the weights of each indicator calculated to get the famous Environmental Performance Index?

Environmental Performance Index is released by Yale's University biennially. It includes a series of indicators and every indicator has a weight. So how was the weight determined? And I do not...

18 September 2024 9,513 3 View

How to explain the opposed associaitons under different lag days in time-series studies?

I want to analyze the associaiton between daily air pollution and hospital addmission using the time-series design. Typically, previous studies would use 0-7 days lag. However, I found positive...

24 June 2022 554 3 View

How to perform conditional logistic regression based on time-stratified crossover study in R software?

In time-stratified crossover study, a case day was matched to several control days, which was suitable to use conditional logistic regression to analysis. But how was the data formatted in excel...

02 June 2022 6,804 2 View

Does the AIC value really work in the selection of degree of freedom ?

When I fit a linear mixed-effect model, I would apply the splines function to control for the potential nonlinear association. For example, the model goes like...

02 June 2022 9,950 2 View