# Questions tagged [regression]

Techniques for analyzing the relationship between one (or more) "dependent" variables and "independent" variables.

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### What statistical test should I use with count data?

In my experiment, participants are shown 4 images (A, B, C, D) that they have to rate on a 5 point scale. So my data looks like this: particpant1: A 5, B 3, C 3, D 1 p2: A 4, B 3, C 2, D 4 p3: A 4, B ...
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### Multiple Regression Extreme Values in all Covariates

In multiple regression: If we have a data set with covariates having extreme values, the max value of the covariate is around 10 to 14 times the mean value of that covariate. This is occurring for all ...
1answer
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### Reason for time fixed effects in regression

I'm currently doing an empirical analysis on the influence of an aging population on house prices. I have panel data with yearly observations for all 51 states of America for the years 1996-2019. When ...
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### Standard Error of Estimate

In a simple regression analysis based on the least squares regression equation, I got the predicted value of 7.15 for the predictor value of 11. The sample size is 35. I computed the Standard Error of ...
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### Diff-in-Diff: Time-varying treatment and Treatment affects Outcome

I would like help with the following question. I have searched the internet and I can't come to a definite DiD setup. I appreciate any help or thoughts that you might want to share. My setting/dataset ...
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### Why should the difference between the adjusted R-square and predicted R-squared be less than 0.2? [closed]

I am building a regression model using RSM-CCD method in Design-Expert software. All the statistical parameters are OK. The difference between the adjusted R-square and predicted R-squared is less ...
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### How to test the null hypothesis that two linear regression lines have the same Y value for a particular X value?

I am using ancova to test if two linear regression models are the same and it works great. I am following this tutorial: http://www.biostathandbook.com/ancova.html and I apply it in R with this ...
1answer
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### Multiple linear regression while using only the explanatory variables with largest correlation (by magnitude)

I'm looking at the analysis for the red wine dataset on https://datauab.github.io/red_wine_quality/. This is a Jupyter note book, and if you go down to about In :...
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### Is this log-log plot that is produced in SPSS sufficient to PH?

How do you graphically test proportional hazard assumption in Cox regression in SPSS? Should I put the variable in the "block" or "Strata" in SPSS? This log-log plot is produced in ...