coefficients

  1. N

    Deriving further values from regression coefficients

    Hi, I’m hoping someone can help me. I’m trying to derive another value from the coefficients of two regression equations. I have 2 regression equations (for example) Miles traveled/year = α1 + β1X + δ1Y Fuel used/year = α2 + β2X + + δ2Y X = engine size and Y = tire pressure The...
  2. C

    Math Help: How to Calculate Weights for Multiplicative Model with Dummy Variables

    Hi Everyone, My question is how do I calculate weights for Y=W1X1*W2X2*WNXN where N is the number of independent variables. I could use logarithms to convert this to an additive model, but each of the independent variables are binary/dummy variables. Here is some background. Assume...
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    Standardized Coefficients - Unit Problem?

    Dear all, I am new to this forum and already wanted to thank all for reading and/or helping. I could unfortunately not find the answer to this question anywhere, or maybe I just misread... I have a little problem after running a multiple linear regression on XLSTAT. I have a dependent...
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    Is here a moderation (when b coefficients are nonsignificant)?

    I am trying to check if the relationship between X and Y is a moderated by M. Model is: Y = X + XX + M + XM + XXM X - independable, M - moderator, Y - dependable. Variables are continuous and normal. First I multiply, then center the variables (I hope it is right). Then run reggresion...
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    Conditional logistic regression- effect of modifiers

    Hi everybody, I am new here in this forum. I am studying the effect of air pollution (PM) on health outcomes, and the characteristics that might modify this effect, using the case crossover analysis. This analysis followed a case crossover procedure where each subject with event contributes...
  6. S

    Comparing regression equations

    Hello! I have a question about how to compare regression equations and regression coefficients. I have data set A with n data points, and two possible predictor data sets, X and Y, that cannot be combined in one equation, i.e., X is one way of explaining A, and Y is a different way. My...
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    comparing "pooled" coefficients between different models

    Dear all, I am running a mediation model with 6 continuous predictors and 2 mediators, separately for boys and girls. I want to test if the regression coefficients differ between gender models. For that, I have found the equation b1-b2/SQRT(s.eb1^2+ s.e.b2^2) and this works fine...
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    Creating new variable from coefficients

    Hi I'm new to stata so just bear with me. I'm doing a VAR using inflation as my dependent variable and exchange rate as an independent variable (amongst others). I would like to create a new variable from the coefficient on "exchange rate" so that I can run a seperate regression with it...
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    odds ratios instead of coefficients for treatment model w/ teffects ipw

    Is there a way to get Stata to display the odds ratios for the treatment model instead of model coefficients after running the 'teffects ipw' command? thank you!
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    comparing regression coefficients between different models to see if they are similar

    Hi all; This is a very elementary problem; but unfortunately, my strengths do not like in statistics: I am trying to describe plant growth over time using accumulated temperature (dd) as my independent variable and the plants 'growth stage' (gs) as my dependent variable. The shape of the...
  11. O

    Interpreting a Summary Table in R (Specifically Estimated Coefficients)

    I feel like an idiot for asking this question, but I always get mixed up with this. For those curious, I'm using the dataset attached to this post. So I was told in this problem to fit simple regression models with kid_score being the response variable and all the mom categories being the...
  12. L

    Determining the Standard Deviation (vice Standard Error) of regression coefficients?

    This is a question I’ve been wondering about for a while, but perhaps it’s not possible or perhaps I just need a point in the right direction. I constructed the attached mock data samples with four variables, A, B, C, D, each of which is either present (1) or not (0). The true value for each...
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    Make predictions with standardized coefficients

    Hello, I've been struggling with a problem since a while, hopefully someone here could help me out. The problem: I want to use the coefficients from a previous research to make a prediction equation. The problem is that the paper only lists the standardized (beta) coefficients of the...
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    Least Squares Parabola

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    Least Squares Slope

    Parabolic Least Squares Estimate Least Squares Parabola Hi all I have been trying to find the values of the coefficients for the least squares parabola: y = a + bx + cx^2 I have taken partial derivatives wrt a, b, c and now have three equations, but I don't know what to do next...any...
  16. R

    linear correlation between T values and coefficients for two-level factorial designs

    Hi all Since I'm not sure if it is a problem of Minitab or not I decided to post this question here. I'm new in multivariate statistics and I would like to understand a possible "linear correlation" between T values and the model coefficients in two-level factorial designs. The problem is...
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    Significance of regression coefficients and interpretation problems

    Dear All, I am currently facing a problem regarding the statistical interpretation of nonsignificant coefficients. I would like to know whether there might be a valid statistical explanation for a coefficient not being significant. So, my questions is the following: how can I statistically...