Linked Questions

This seems to be a basic issue, but I just realized that I actually don't know how to test equality of coefficients from two different regressions. Can anyone shed some light on this? More formally, ...

I would like to test the difference in response of two variables to one predictor. Here is a minimal reproducible example. ...

I need to compare two regression slopes where: $ y_1 ~ a + b_1x y_2 ~ a + b_2x $ How can I compare b1 and b2? Or in the language of my specific example in ...

I am looking for the best approach to test for the significance of the effect of an intervention that occurred at a known time on a time series data. Using a toy dataset as an example, I have come up ...

Background I am comparing data on how ATPase activity from flight and leg muscle from locusts reacts to different concentrations of calcium. I plotted a scatter graph of each data set on the same ...

I have a data of sea levels from a particular station from 1940 till today. The linear regression on the data from 1940-1980 resulted in a slope of 3. The linear regression on the data from 1980-2010 ...

There are lots of related CV questions to the title above, but I'm looking for some clarification on a specific approach, and some explanation. The set up is as follows (adapted from another question)...

Say you have an independent variable, $x$, and two dependent variables $y_1$ and $y_2$. I want to calculate whether these two variables have a significantly different slope. I can do it by calculating ...

I'm reading a paper that does not report the coefficients from two OLS regressions. In both cases there is 1 response variable and 1 predictor variable. The predictor variable is the same in both ...

I have performed mixed effect Cox hazard regressions, and reconstructed the slopes to get group specific slopes (e.g. sex-specific responses to the explanatory variable). I aim to test whether the ...

I am following the methods described in: Clogg, C. C., Petkova, E., & Haritou, A. (1995). Statistical methods for comparing regression coefficients between models. American Journal of Sociology, ...

I'm working with psychophysiological data--specifically, tonic electrodermal activity (EDA). Tonic EDA is commonly accepted as an indicator of arousal. Simply put, I sample tonic EDA over time as ...

I have a set of observations. When I do an OLS I get a $\beta$. After I remove some values I also get a $\beta$. Now I want to test if the properties of two betas are the same? Please give me a hint ...

I saw this post for calculating a z-score between two slopes (Test a significant difference between two slope values), but is there something like this for two quadratics?

I would like to compare two beta coefficients from two different Poisson models which have the same variables and applied to different samples. I would like to test their difference to check if the ...

I have a question regarding my logic of how to go about checking for the significance between two average slopes. I hope my message comes across clear. The data I am analyzing consists of two sets, ...

I have a follow-up question to this threat: Test a significant difference between two slope values There is a formula introduced to calculate a z-score when testing for a significant difference ...

For some consecutive years I have a number of incidents in a given city. From the scatter plot I deducted that the incidents increase linearly, so I performed a Linear Regression test. The slope is ...

Brief summary of my study: I am studying two types of organizations, A and B. For both organizations A and B, I measured how centralization affected innovation. There were significant differences ...