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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Please help.... explaining the table

    Hi, all I am working on a bivariate probit model and I nearly got the results, but I have no idea to check about collin.... and hetro... problems....

    Started by momo‎, 10-15-2010 10:42 AM
    • Replies: 2
    • Views: 3,847
    10-18-2010, 04:20 AM Go to last post
  2. Unhappy Basic Help with Multiple Regression Results

    Can you help? I'm trying to run a basic multiple regression in SPSS 18. I have a series of measurements made in cm, and I want to find the...

    Started by Medical‎, 10-18-2010 12:30 PM
    • Replies: 0
    • Views: 2,067
    10-18-2010, 12:30 PM Go to last post
  3. Help with non-linear regression, SPSS

    Hey all New to the forums and was hoping for some help with writing out part of a non-linear regression model from somebody brighter than me. So...

    Started by fortenberry‎, 10-19-2010 08:13 AM
    • Replies: 2
    • Views: 5,530
    10-19-2010, 10:02 AM Go to last post
  4. help for results explanation

    Hey all, I do a bivariate probit regression, and to test heteroscedasticity I used linear regression and got the next results, so what do you...

    Started by momo‎, 10-21-2010 06:24 AM
    • Replies: 0
    • Views: 2,216
    10-21-2010, 06:24 AM Go to last post
  5. Complex stansardized Residuals

    Dear all, I am doing some nonlinear regression and use mathematica to calculate the associated FitResiduals and StudentizedResiduals. I am a bit...

    Started by Clovis‎, 10-21-2010 10:59 AM
    • Replies: 2
    • Views: 2,428
    10-21-2010, 12:23 PM Go to last post
  6. Need for Transformation?

    I'm running an OLS regression. My predictors are continuous, but they are proportions that are bounded by 0 and 1. Because there are many 0s in my...

    Started by intlgirl‎, 10-23-2010 08:36 PM
    • Replies: 2
    • Views: 3,850
    10-23-2010, 10:40 PM Go to last post
  7. Partial r is greater than zero-order correlation

    I am puzzled by something I have not come across before. To explain, I have conducted a hierarchical multi-regression with a post-therapy outcome...

    Started by RDresearcher‎, 10-22-2010 02:47 PM
    • Replies: 1
    • Views: 9,128
    10-24-2010, 06:05 AM Go to last post
  8. Parameter stability over time

    Hi guys, I am taking this introductory methods to statistics in a finance program and I need to do the following. Compare S&P500 vs TSX and...

    Started by Dibbs‎, 10-25-2010 08:13 AM
    • Replies: 0
    • Views: 2,745
    10-25-2010, 08:13 AM Go to last post
  9. Determining best independent variables through factor analysis

    Hi everyone, I have a dependent variable and 18 independent variables. I remember from an applied statistics class I took, that there is a way to...

    Started by gophins‎, 10-25-2010 05:39 PM
    • Replies: 0
    • Views: 2,195
    10-25-2010, 05:39 PM Go to last post
  10. Exclamation Is the difference significant.

    I'm using stata since only a few weeks for my thesis. I can use some help regarding the following: I wanted to know what the mean grade is for...

    Started by Anbrhave‎, 10-28-2010 10:04 AM
    • Replies: 0
    • Views: 4,945
    10-28-2010, 10:04 AM Go to last post
  11. Regression for Positive and Negative Integers

    My independent variable is a difference in count data. I was wondering if there was a specific regression that should be used for data that contains...

    Started by tiab2005‎, 10-29-2010 06:08 AM
    • Replies: 1
    • Views: 4,503
    10-29-2010, 10:30 AM Go to last post
  12. Simulated response

    Hi, I have a bunch of simulated predictors and the assumed coefficients that I'm going to use. Now I need to simulate the response Y = b0 +...

    Started by zzzc‎, 10-29-2010 05:44 PM
    • Replies: 1
    • Views: 3,063
    10-29-2010, 06:49 PM Go to last post
  13. Multiple Regression Repeated Measures with a continuous independent variable

    I have a complete within-subjects 2x2x5 designs, i.e. all 12 subjects I have have done the 20 combinations of conditions. My problem is that the 3rd...

    Started by metric‎, 10-15-2010 12:04 PM
    • Replies: 1
    • Views: 7,346
    10-29-2010, 08:47 PM Go to last post
  14. stating the model (logistic) in my report

    Hi, Sorry this might seem like silly question. But I'm wondering whats the conventional way of stating the logistic binary model when writing up...

    Started by zzzc‎, 10-29-2010 01:14 PM
    • Replies: 1
    • Views: 1,999
    10-30-2010, 08:56 AM Go to last post
  15. Am I doing binary logistic regression correctly?

    Hi all, I have data relating to the presence or absence of electrolytes in water, and the volume of water drunk. I need to do an analysis to see...

    Started by Sciencekid‎, 10-31-2010 07:51 AM
    • Replies: 0
    • Views: 2,777
    10-31-2010, 07:51 AM Go to last post
  16. Exclamation Regression and Likert scale variable..HELP!

    Hi everybody, I'm wondering if it is possible to run a multiple regression with a dependent variable measured on a 5-point Likert scale (where 1...

    Started by Latika‎, 10-29-2010 12:14 PM
    • Replies: 11
    • Views: 9,393
    11-01-2010, 04:45 AM Go to last post
  17. Panel: Interaction and centering

    Hi guys, I have a panel where I want to run a fixed effects regression with an interaction term. The problem is that one factor of the term is...

    Started by Nardo‎, 11-01-2010 08:12 AM
    • Replies: 0
    • Views: 3,521
    11-01-2010, 08:12 AM Go to last post
  18. Marginal effects after biprobit

    Dear Colleagues, I run a biprobit regression and all variables are significant but I found that the sign of the independent variables changes...

    Started by momo‎, 11-01-2010 04:32 PM
    • Replies: 0
    • Views: 4,576
    11-01-2010, 04:32 PM Go to last post
  19. Need some help with multiple regression

    Hi guys. For my project i need to to a regression with a bunch of data I've gathered. I have 7 variables and i did the regression in excel and got...

    Started by c2q‎, 11-02-2010 10:40 PM
    • Replies: 4
    • Views: 2,178
    11-03-2010, 03:28 AM Go to last post
  20. Arrow How to deal with the dependent predictors in the regression ?

    My data have some high correlated predictors, so it fit worse in the linear regression. what regression methods are proposed to solve this...

    Started by purple‎, 11-03-2010 01:39 PM
    • Replies: 4
    • Views: 3,457
    11-04-2010, 11:18 AM Go to last post
  21. results explanation (help please)

    After running a bivariate probit model and likelihood ratio for two different categories I got these results, so what do you think of it. any...

    Started by momo‎, 11-05-2010 11:12 AM
    • Replies: 0
    • Views: 2,058
    11-05-2010, 11:12 AM Go to last post
  22. Exclamation Finding standard error for elasticity (log-log model)

    Hi guys, Can anyone help with this? In(sub) = 3.43 - 0.899 In(Price) + 0.374 In(Age) + 0.141 In(Age)In(Price) + 0.229 In(Characters) The...

    Started by cuteylion‎, 11-08-2010 04:04 AM
    • Replies: 0
    • Views: 4,941
    11-08-2010, 04:04 AM Go to last post
  23. Forecasting assignment (Time series data)

    Hi - I am new to this forum and hope to learn a thing or two from you experienced lads! I work at a companacy where we are looking into the...

    Started by VBA2010‎, 11-08-2010 05:42 AM
    • Replies: 1
    • Views: 4,472
    11-08-2010, 07:47 AM Go to last post
  24. logistic regression

    Hi I am using a logistic regression to determine siginificant variables for dependent variable as well as to develop a function to predict the...

    Started by JFI‎, 11-08-2010 11:09 AM
    • Replies: 0
    • Views: 2,269
    11-08-2010, 11:09 AM Go to last post
  25. Question Instruments

    I have a question concerning endogenous variables. I want to do the following OLS regression: Grade Point Average=constant + φ1 work hours + φ2...

    Started by Anbrhave‎, 11-03-2010 05:56 AM
    • Replies: 1
    • Views: 2,150
    11-08-2010, 12:40 PM Go to last post
  26. transform y to log(y)

    Hi, I'm wondering what kind of data is appropriate for transforming the response y into log(y)? ( So the model becomes log(y)= a^x1 +...

    Started by zzzc‎, 10-22-2010 08:12 PM
    • Replies: 10
    • Views: 7,280
    11-08-2010, 01:43 PM Go to last post
  27. least squares restrictions

    Hi there, I want to perform least squares for a lineaar model with linear restrictions on the parameters. The restrictions are also linear with...

    Started by leo nidas‎, 11-08-2010 05:40 PM
    • Replies: 0
    • Views: 2,072
    11-08-2010, 05:40 PM Go to last post
  28. Dealing with Null values in Differenced Data

    Hi everyone, I'm running a regression analysis to try and explain the effect of advertising on brand interest. Essentially, what I want to be able...

    Started by statguy_33‎, 11-08-2010 08:40 PM
    • Replies: 0
    • Views: 2,223
    11-08-2010, 08:40 PM Go to last post
  29. Help with estimation method

    Hi, I have a dataset as follows: There are n individuals. Each individual has a fixed amount of money spent on a basket of three goods A, B, C....

    Started by gabeo‎, 11-09-2010 03:07 AM
    • Replies: 0
    • Views: 2,468
    11-09-2010, 03:07 AM Go to last post
  30. quick question

    Can someone tell me the difference between Model I and Model II regression? I have some data that I'd like to plot in JMP but I'm not sure which...

    Started by aesopclimber‎, 11-09-2010 04:43 AM
    • Replies: 0
    • Views: 2,892
    11-09-2010, 04:43 AM Go to last post
  31. multiple regression

    Hi , i have three variables for the question below.For each scenarios that is gulf view houses and no gulf view houses. The variables are sale...

    Started by SadieKhan‎, 11-09-2010 06:12 PM
    • Replies: 4
    • Views: 8,517
    11-10-2010, 01:06 AM Go to last post
  32. Estimation method for ratio dependent variable?

    Hi, Logistic regression is used if the dependent variable is a discrete choice variable. My dependent variable is not a discrete choice variable,...

    Started by gabeo‎, 11-10-2010 02:37 AM
    • Replies: 4
    • Views: 11,507
    11-12-2010, 05:30 AM Go to last post
  33. Kruskal-Wallis equality-of-populations rank test

    Dear Colleagues I am using KW test to check the differences between Four different types of companies and I use four variables, so I check for...

    Started by momo‎, 11-12-2010 09:27 AM
    • Replies: 0
    • Views: 5,398
    11-12-2010, 09:27 AM Go to last post
  34. Factor Analysis

    I ran the factor analysis, but I want to make sure I have the groupings right. I am attaching my analysis and the rotated component matrix has...

    Started by drdokter‎, 11-13-2010 09:31 AM
    • Replies: 1
    • Views: 2,349
    11-13-2010, 02:15 PM Go to last post
  35. Non-Existent Beta Matrix

    Help please: Consider only a simple linear regression model for this please. so, Y(vector) = X matrix * Beta matrix + Error(vector) under...

    Started by floriandotti‎, 11-14-2010 10:02 PM
    • Replies: 1
    • Views: 2,475
    11-15-2010, 12:13 PM Go to last post
  36. Mixed model variance estimates

    Hello, With the mixed model y_ij = mu + alpha_i + epsilon_ij where alpha_i a random effect with distribution assumed normal and epsilon_ij is...

    Started by kogan.clark‎, 11-15-2010 11:15 PM
    • Replies: 0
    • Views: 2,553
    11-15-2010, 11:15 PM Go to last post
  37. suppressor variables

    I have built a multiple linear regression model with two independent variables (say X1 and X2). The primary aim is *not* to use the model for...

    Started by bbkaran‎, 11-17-2010 05:58 AM
    • Replies: 0
    • Views: 2,393
    11-17-2010, 05:58 AM Go to last post
  38. Multinomial Logit vs Dummies vs Ordinal Logit

    Hello everybody, I need help with the following: I would like to conduct a survey, where my dependent variable would be a discrete, nominal...

    Started by EgZeKuToR‎, 11-18-2010 03:22 PM
    • Replies: 0
    • Views: 4,268
    11-18-2010, 03:22 PM Go to last post
  39. MANOVA vs multiple ANOVAs

    Hello everyone, For starters, I just found this site and am wondering where it has been all my life, or all my PhD, they feel like the same thing...

    Started by kron3007‎, 11-18-2010 05:26 PM
    • Replies: 1
    • Views: 6,843
    11-18-2010, 11:24 PM Go to last post
  40. Weighty issue...

    Hi I have a conceptual issue with some data I am analysing. I am looking at the point prevalence of a particular disease as reported in medical...

    Started by dml123‎, 11-19-2010 04:59 AM
    • Replies: 0
    • Views: 2,380
    11-19-2010, 04:59 AM Go to last post
  41. Interaction term

    Hi! On a general basis I'm wondering if it is ok (meaningful) to exclude a covariat from a regression model when an interaction is included. ...

    Started by Thebear‎, 11-20-2010 12:43 PM
    • Replies: 0
    • Views: 2,847
    11-20-2010, 12:43 PM Go to last post
  42. Regression Estimated variance and Chi-square distribution

    Hi all * If i have a data set and I model it using linear regression I estimate intercept, slope and variance Ymodel=a+bx and the...

    Started by saaagar‎, 11-21-2010 04:48 AM
    • Replies: 0
    • Views: 4,306
    11-21-2010, 04:48 AM Go to last post
  43. centered polynomials

    in a model involving Y= B0 + B1X1 + B2X2^2, how does centering the model affect the parameters. why does the hypothesis test associated with B2...

    Started by floriandotti‎, 11-23-2010 12:09 AM
    • Replies: 1
    • Views: 4,173
    11-23-2010, 01:01 AM Go to last post
  44. Exclamation Instrumental variable analysis

    Dear people, In my simple regression analysis are two variables endogenous. GPAi = α + β•Wi +β•Wi^2 + θ•Si + θ•Si^2 + Qi•φ + εi Where Wi and Si...

    Started by Anbrhave‎, 11-23-2010 07:55 AM
    • Replies: 0
    • Views: 4,792
    11-23-2010, 07:55 AM Go to last post
  45. choosing the right model

    Hello, Does it makes sense to test H_knot : Beta1 = 0 after having rejected H_knot : Beta2 = 0. So in other words, if it appears that a 2nd...

    Started by floriandotti‎, 11-23-2010 12:06 AM
    • Replies: 4
    • Views: 2,771
    11-23-2010, 12:03 PM Go to last post
  46. Excel's t stat question.

    Hi guys, I'm a little confused over this right now. I performed a regression in excel and as an example, this is what i got for my first...

    Started by c2q‎, 11-23-2010 06:14 PM
    • Replies: 3
    • Views: 5,120
    11-23-2010, 06:49 PM Go to last post
  47. Comparing coefficients for nested logistic regressions

    Hi, maybe one out there can help. I am interested in comparing the coefficients of two binary logistic models. In one nested in the other one,...

    Started by dnh‎, 11-22-2010 04:09 PM
    • Replies: 9
    • Views: 4,436
    11-24-2010, 08:45 AM Go to last post
  48. Modelling business data

    Hello, I have a strong history in modelling chemical data and other scientific data. I have a data set that I'm working with and I want to take...

    Started by gcam032‎, 11-24-2010 09:37 AM
    • Replies: 0
    • Views: 2,424
    11-24-2010, 09:37 AM Go to last post
  49. Arrow Rmse

    Ok so now I have developed calibration regression models for predicting the levels of 2 Fatty acid isomers 1 and 2. The isomer 1 is present in high...

    Started by rafters‎, 11-24-2010 06:07 PM
    • Replies: 0
    • Views: 2,866
    11-24-2010, 06:07 PM Go to last post
  50. Multinomial 2 dv's?

    Hi All. I'm happy to be part of the Talk. Question: Is is possible to do a multinomial logistic regression if you only have 2 categories of...

    Started by Dxbugs‎, 11-26-2010 08:22 AM
    • Replies: 1
    • Views: 2,612
    11-26-2010, 08:44 AM Go to last post
  51. Arrow Plz suggest good textbook for statistics in regression analysis

    Hie. Can anyone please post a good text book or a reference guide for the Multi regression analysis which can explain all the statistics behind the...

    Started by rafters‎, 11-27-2010 02:13 PM
    • Replies: 0
    • Views: 4,025
    11-27-2010, 02:13 PM Go to last post
  52. Develop regression model while given "average" data

    I'm stuck on the following question and would like some guidance please: From a study, the average heights of Grade 5, Grade 6 and Grade 7 boys...

    Started by hank755‎, 11-28-2010 10:31 AM
    • Replies: 2
    • Views: 2,889
    11-28-2010, 06:32 PM Go to last post
  53. Interpretation of MANOVA

    Hello everyone, Forgive me for my ignorance, but I have a quick basic question. When conducting a MANOVA (Using JMP) the output gives me values...

    Started by kron3007‎, 11-29-2010 01:54 PM
    • Replies: 1
    • Views: 4,304
    11-29-2010, 01:55 PM Go to last post
  54. Point me in the right direction

    Hi there, I am currently trying to determine the relationship between a spot price and a contract price. My spot price is obviously moving...

    Started by marketing-grad‎, 11-29-2010 11:42 PM
    • Replies: 2
    • Views: 3,654
    11-30-2010, 01:00 AM Go to last post
  55. Multiple linear regression + QQplots problem! Includes Pics!

    Hello I want to do multiple linear regression, but one of the requirements is the residuals to be normally distributed, and I can check that with...

    Started by emelie_earlgrey‎, 11-25-2010 01:58 PM
    • Replies: 3
    • Views: 3,047
    11-30-2010, 12:34 PM Go to last post
  56. Step by Step by Step help please?

    Hello all, can anyone help me understand this step by step understanding of linear regression and correlation?

    Started by Biostat212‎, 12-02-2010 04:27 PM
    • Replies: 6
    • Views: 3,961
    12-03-2010, 04:14 AM Go to last post
  57. Survey Results & Regression Analysis..Dummy Variable?

    Hello All. I have just received results back from a survey that I launched and I need help on how to analyze the results. There may be some need...

    Started by StatsGuy112233‎, 12-01-2010 11:39 PM
    • Replies: 1
    • Views: 4,728
    12-04-2010, 01:08 AM Go to last post
  58. Question insignificant variables- what to do?

    Hello, I'm running a few regressions for an econometrics paper and have a question: should insignificant independent variables be omitted from...

    Started by toni_azoulay‎, 12-03-2010 11:47 PM
    • Replies: 2
    • Views: 10,549
    12-04-2010, 01:23 AM Go to last post
  59. How to conduct a repeated measures regression with ordinal outcome variable?

    Hi, I am trying to predict an ordinal variable (success: 0, 1, 2, 3). I have 3 predictor variables I want to include in the analyses together with...

    Started by Sausage‎, 12-04-2010 04:03 PM
    • Replies: 0
    • Views: 4,170
    12-04-2010, 04:03 PM Go to last post
  60. Red face Polynomial regression help

    Hello, I am working in retailing here in Europe, and we are trying to support evidence that sales are positively correlated with space allocated,...

    Started by GraceJones‎, 11-29-2010 12:16 PM
    • Replies: 1
    • Views: 3,791
    12-05-2010, 04:02 PM Go to last post

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