Questions tagged [regression-coefficients]

The parameters of a regression model. Most commonly, the values by which the independent variables will be multiplied to get the predicted value of the dependent variable.

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Fundamental question on significance in linear regression

In a standard multi-variate linear regression, the distribution of the regression coefficients is a multivariate normal. We still manage to build statistical significance tests for single coefficients,...
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How can all-positive coefficients be chosen in 2nd order linear regression to minimize the number of coefficients?

(this question addresses an expanded case of How can factor-levels be automatically chosen in R to maximize the number of positive coefficients in a regression model?) I am performing linear ...
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unstandardized coefficients where mean-centered X variables have +/- values from 0 [duplicate]

Possible Duplicate: How to interpret regression coefficients for a variable with takes positive and negative values? I'm performing negative binomial regression and one of my centered-mean X ...
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Regressing regression coefficients

I'm looking for advice/opinion on whether the co-efficient(s) resulting from a geographically weighted regression analysis can subsequently be entered into an OLS regression as the dependent variable (...
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How to explain change of sign on regression coefficient when another variable is added to OLS model? [duplicate]

I am trying to run an OLS regression, with log of per capita calorie as my dependent variable and age and years of education of household head, log per capita expenditure as my independent variables (...
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How to achieve r value 1.0 with Linear slope angle 10° in R [closed]

I have been reading about the r value and its purpose, however the below image has altered my understanding(that r value represents Direction and Strength and also ...
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Hypothesis testing for marginal effect

I have a quadratic linear regression of the form: y = B0 + B1x^2 I need to do a hypothesis test that the marginal effect of an additional unit of x at a specific level of x is greater than 100. I ...
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variance-covariance matrix of a “zeroinfl” object [closed]

There is a command in R to derive the variance-covariance matrix of a glm (model) objects. Does any one know if there is a command which one can derive variance-covariance matrix of a Zero inflated ...
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How to calculate the impact on dependent variable with two independent variables with different sample sizes

I am researching a framework using regression analysis. With the beta coefficients I now want to calculate the correlation between my variables with the influence of another. So I have the beta of 0,...
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Adding new variables makes regression coefficients individually insignificant [duplicate]

I have a multiple regression where all my coefficients are significant. When I add new variables my initial variables become insignificant. Furthermore, my new variables (that in a simple regression ...
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Why can certain variables in a multiple regression not be included in logarithmic form? [closed]

I have a multiple regression equation where log(salary) = b0 + b1(ceotenure). What is the purpose of putting the dependent variable in logarithmic form? How would you interpret the change in y for a 1 ...