1. M

    Is it possible to run a multiple linear regression analysis when one of the categorical predictors has more than 2 groups?

    I want to run a multiple linear regression analysis with 5 categorical or continuous predictors (independent variables) for a continuous outcome (dependent variable). Is it possible to use a multiple linear regression analysis if one of the predictors has more than 2 groups?
  2. P

    Calculating model (Analytically)

    Hi, can anyone help me out with this question? Assume that the true data generating process (the true model) is: y = 20 −30(x + r) + 4w + ê. Suppose that we also know that E(ê|x) = E(ê|w) = E(ê|r) = 0, Cov(x, w) = 20, Cov(x, r) = Cov(w, r) = 0, Var(x) = 10, Var(w) = 8 and Var(r) = 6. What...
  3. james.wilson

    I need guidance on figuring out a linear regression model from a dataset

    Hello, I'm completely stuck on this. If anyone could guide me in the right direction for this linear regression model it would be very appreciated! Dataset:
  4. M

    Linear regression analysis assumptions not met

    I want to demonstrate a possible association between a dichotomous independent variable and a continuous dependent variable. Therefore, I wanted to use a linear regression analysis. However, the dependent variable is not normally distributed, while normality is an assumption of linear regression...
  5. M

    Panel study, multiple linear regression, assumptions

    Hey. I am doing a project where I am studying a set of companies over a 7-year period. I am doing a multiple linear regression analysis either with fixed or random effects (so, it's a panel study). What I am wondering is if the general assumptions/requirements apply when using the...
  6. O

    New Linear Regression Approach - Link Here

    My company has just released a free software download that eliminates known issues associated with traditional techniques. The InoraRAE has a simple interface and calculates fast, accurate results, making it more meaningful and useful than any linear regression tool before it. It is available...
  7. S


    If you wanted your null hypothesis to be that y and x are linearly related, and your alternative to be that they are quadratic. What could you use as your null and alternative hypothesis, and how would you go about testing it?
  8. J

    Exponential Regression to Forecast Future Growth

    Hi, I'm a C# programmer and am not a math major. I have a programming problem that I am trying to solve and hope that someone here can help me solve it. I need to use Exponential Regression to forecast the future earnings of a company. I have the past 10 years of quarterly data. I can do...
  9. Lukan27

    Help on interpreting linear regression

    Help on interpreting linear regression estimates I'm currently working on a larger assignment, and I need some input how to interpret the results from my/a linear regression. I'm pretty sure I get it right, but as a precautionary measure some input would be lovely. I've websearched and...
  10. P

    basic 3 year's observations forecasting - need for tips and feedback

    Hello everybody, I need advice about simple forecasting strategies and wondered if anyone here could kindly give me feedback. In each of the four charts shown below we have three results (2011 to 2013) of the number of farmers (above) and school teachers (below) that have enrolled and...
  11. S

    Constant negative fitted I missing something?

    Hello all, I'm attempting to fit a model where y variable is a variety of $/ha/year figures (all positive) ranging between 0.01 and 2520. The output of this should always have positive fitted values (none of these values should ever be below 0), and yet I get constant negative fitted values...
  12. J

    Help with linear regression model?

    I need to construct a linear regression model for the following information but i'm not entirely sure how to do it! S H L D Y 0 0 0 0 7.06 0 0 1 0 4.42 0 1 0 0 8.83 0 1 1 0 7.81 0 0 0 0 7.73 0 0 1 0 6.69 1 0 0 1 11.74 1 0 1 1 9.91 1 1 0 1 12.63 1 1 1 1 12.85 1 0 0 1 9.57 1 0 1 1...
  13. T

    "Is there a sig. difference in amount of subunits between 2 groups according to age"

    Hello! I think I've said it all in the title. I need to run right statistics to answer my question. I guess I have 2 independent variables (age in days and group code (1=experimental group; 2=control group)) and 1 dependent (amount of subunits), right? O.K. so I found out, that I can't do a...
  14. M

    Linear Regression while comparing results?

    Hi all I am working on a research project for a basic stats course. I'm in the planning phase and could use some pointers to make sure I'm going in the right direction. Question: How do I do a linear regression while assuring that the dependent variable is unique for each set of distinct...
  15. D

    GLM with Linear Dependencies

    Hi: Newbie to SPSS. Tons of stats and programming knowledge ... but helping a novice with their SPSS work. If I was doing this as a regression in package where I had to type in my own variables, this wouldn't be an issue. I have 2 fixed factors, A and B. There 3 values of A. B is a...
  16. G

    Modelling a variable

    Hi everybody, my problem is a variable (age) that I wish to enter into linear regression - but, the variable is not linear. So, I want to model it. But, it doesn't work so far. I already tried: log10, exp, ², √, and /1. Is there anything else I could try? I already talked to a...
  17. H

    what test should be used to tell if two regression lines are significantly different

    I have two lines in a x-y plot 1. observed migration distance (y) and predicted migration distance (x) (Y=0.95X+0.31, the slope coefficient and the intercept p-value = 0.001) 1:1 line (slope: 1 and intercept: 0) The null hypothesis is y=ax+b a1=1=a2 and b1=b2 Please kindly advise what...
  18. S

    step change

    Fir a step change model, is it a linear model ?
  19. Q

    Correlation help

    i ran a normality test and both variables were >0.05 so normal. but when i run a linear correlation so i can generate a predictive equation one of the unstandarised co-effciens (B) shows the number 2.104E-5..............what's the E-5?? in class this never happened and I'm on break now so can't...
  20. A

    GLM output

    I am conducting a series of GLMs in order to find the minimum adequate model, the largest model in which all factors are significant. In some of my models all factors are significant, except for the intercept... what does this mean?? thanks andy