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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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: 4,583
    11-01-2010, 04:32 PM Go to last post
  2. 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: 3,527
    11-01-2010, 08:12 AM Go to last post
  3. 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: 9,404
    11-01-2010, 04:45 AM Go to last post
  4. 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: 2,778
    10-31-2010, 07:51 AM Go to last post
  5. 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: 2,002
    10-30-2010, 08:56 AM Go to last post
  6. 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: 7,352
    10-29-2010, 08:47 PM Go to last post
  7. 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: 3,068
    10-29-2010, 06:49 PM Go to last post
  8. 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: 4,505
    10-29-2010, 10:30 AM Go to last post
  9. 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: 4,975
    10-28-2010, 10:04 AM Go to last post
  10. 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: 2,201
    10-25-2010, 05:39 PM Go to last post
  11. 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: 2,758
    10-25-2010, 08:13 AM Go to last post
  12. 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: 9,138
    10-24-2010, 06:05 AM Go to last post
  13. 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: 3,856
    10-23-2010, 10:40 PM Go to last post
  14. 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: 2,434
    10-21-2010, 12:23 PM Go to last post
  15. 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: 2,219
    10-21-2010, 06:24 AM Go to last post
  16. 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: 5,539
    10-19-2010, 10:02 AM Go to last post
  17. 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: 2,069
    10-18-2010, 12:30 PM Go to last post
  18. 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: 3,856
    10-18-2010, 04:20 AM Go to last post
  19. Spurious or not? a little help for a newbie

    Hi to all, I am relatively new to statistics and I try to do my best. I will appreciate any helpful inputs form you. First, I had to generate a...

    Started by Neptune‎, 10-17-2010 10:57 AM
    • Replies: 0
    • Views: 2,134
    10-17-2010, 10:57 AM Go to last post
  20. Red face Stupid Question: Help This Noob with Parking

    :o Hi, I have been knocking my head against the wall of statistics (so to speak) for uncounted hours and just can't figure this out. I cannot...

    Started by meinhaj‎, 10-15-2010 11:38 AM
    • Replies: 1
    • Views: 3,854
    10-15-2010, 11:53 AM Go to last post
  21. collinearity and Heteroscedasticity in bivariate probit model

    Hi, all I run a bivariate probit regression, and I am not specialized in statistics and I dont know how to check collinearity and...

    Started by momo‎, 10-14-2010 03:32 PM
    • Replies: 0
    • Views: 5,713
    10-14-2010, 03:32 PM Go to last post
  22. I cannot calculate covariance ratio, please help me

    My results of covariance ratio (influence statistic) is always different as for example the SPSS output. I donít know where is my failure. Could...

    Started by Palepoli‎, 10-14-2010 03:09 PM
    • Replies: 0
    • Views: 3,896
    10-14-2010, 03:09 PM Go to last post
  23. Correlation and Regression Assignment Using BRFSS

    "For this assignment you must collect some state-level variable of your choice and merge it to the BRFSS individual-level data (matching by state...

    Started by littlebee‎, 10-13-2010 09:28 PM
    • Replies: 0
    • Views: 2,774
    10-13-2010, 09:28 PM Go to last post
  24. Linear Regression for Traffic Data

    Hi there, I have a two full years of traffic data by month and I am trying to predict traffic for the next two years based on historical growth...

    Started by dramachandran‎, 10-11-2010 06:46 PM
    • Replies: 3
    • Views: 4,802
    10-13-2010, 11:25 AM Go to last post
  25. Meaning of Logarithmic Trend Line

    Hello Everyone I was just curious as to the meaning of the slop in an Excel logarithmic trendline. For example, y = -0.039ln(x) + 1.6792, where x...

    Started by skohon‎, 10-13-2010 10:45 AM
    • Replies: 0
    • Views: 5,217
    10-13-2010, 10:45 AM Go to last post
  26. Regression analysis research project help.

    Hi, I have a project i have to do for my regression analysis course. Basically I need to gather a bunch of data and plot it and find a regression...

    Started by c2q‎, 10-12-2010 01:10 AM
    • Replies: 1
    • Views: 6,742
    10-12-2010, 01:07 PM Go to last post
  27. Method to calculate the most accurate method of prediction

    Hi, this is my first post, and I'm entirely self taught re statistics, so go easy on me. :) I want to calculate which of several prediction...

    Started by joshAU‎, 10-12-2010 04:30 AM
    • Replies: 1
    • Views: 6,159
    10-12-2010, 01:04 PM Go to last post
  28. Regression of probability distributions

    I have an dataset where the y values are multiple points representing a probability distribution rather than a single discrete point. I'm trying to...

    Started by JeffTheGreen‎, 10-06-2010 05:32 PM
    • Replies: 5
    • Views: 3,256
    10-12-2010, 04:45 AM Go to last post
  29. Significant Correlations - No Sig Beta Weight

    Hi guys, I'm hoping that someone can clear up my confused state of mind...:( I have conducted a standard MRA and my problem is that even though...

    Started by StormSurfer‎, 10-10-2010 10:54 PM
    • Replies: 2
    • Views: 5,092
    10-11-2010, 05:20 PM Go to last post
  30. Interpolation

    Hello. Two questions: First, what would be the most suitable method for interpolation where the data is: 1. Mostly increasing with an...

    Started by Klesti‎, 10-11-2010 01:36 PM
    • Replies: 0
    • Views: 2,016
    10-11-2010, 01:36 PM Go to last post
  31. significant r but assumptions not met

    Dear All, issue here stems from the one discussed in a previous post of mine (http://talkstats.com/showthread.php?t=13844). I have a dataset...

    Started by gianmarco‎, 10-11-2010 05:32 AM
    • Replies: 2
    • Views: 2,575
    10-11-2010, 10:01 AM Go to last post
  32. Logistic regression. biological significance of a mathematical model quadratic term.

    See if anybody can help me understand something, as I am a bit confused. It is regarding the biological significance of a mathematical model...

    Started by patxarana‎, 10-11-2010 05:30 AM
    • Replies: 2
    • Views: 4,460
    10-11-2010, 07:15 AM Go to last post
  33. bootstrap correlation

    Hi, I am wondering if is it correct to use bootstrap methods to get an estimate of correlation coefficient (Pearson) when data violate some of the...

    Started by gianmarco‎, 10-02-2010 01:40 AM
    • Replies: 2
    • Views: 5,674
    10-08-2010, 02:09 AM Go to last post
  34. is there a non parametric alternative to multiple linear regression?

    Hi all, I would like to know is there a non parametric alternative to multiple linear regression? when I google the quesion I get a lot of info...

    Started by David Williams‎, 09-21-2010 11:25 AM
    • Replies: 7
    • Views: 27,956
    10-07-2010, 03:37 PM Go to last post
  35. Logistic regression with dependent variables

    Dear All I'm trying to perform logistic regression to determine risk factors for retinopathy of prematurity (ROP). The outcome is binary 1=...

    Started by SiBorg‎, 10-02-2010 04:47 AM
    • Replies: 4
    • Views: 5,775
    10-06-2010, 06:35 PM Go to last post
  36. theory proofs

    Hi, I am doing a study guide for my stat test coming up, and got stuck on 3 proofs. They seem a bit confusing to me, and I just keep going in circles...

    Started by lilfish08‎, 09-30-2010 02:29 PM
    • Replies: 1
    • Views: 4,098
    09-30-2010, 04:09 PM Go to last post
  37. Var(Y_knot_Hat)

    Hello all, I need a little help with this: Show Var(Y_knot_Hat) = Sigma^2 * (1/n + (x_knot - x_bar)^2 / Sxx) Start with Y_knot_hat = b_knot...

    Started by floriandotti‎, 09-30-2010 01:07 AM
    • Replies: 5
    • Views: 4,087
    09-30-2010, 01:07 PM Go to last post
  38. polytomous regression - help obtaining p for heterogeneity

    I am using polytomous (aka multinomial) logistic regression to analyze some data. My outcome/dependent variable is nominal (unordered) with 4...

    Started by Stuart‎, 09-21-2010 04:23 PM
    • Replies: 1
    • Views: 5,002
    09-25-2010, 06:58 PM Go to last post
  39. cox regression and change

    I'm no statistician, but a porgrammeur. I have some statistics during my study, but is not really one of my stektste points. 'm Trying to calculate...

    Started by Zaatlob‎, 09-24-2010 09:27 AM
    • Replies: 0
    • Views: 2,184
    09-24-2010, 09:27 AM Go to last post
  40. Interpreting an order logit

    This isn't my homework, but was acctually meant for my blog. I had planned on running the ordered logit models, running predicted probabilities and...

    Started by amathew‎, 09-23-2010 07:33 PM
    • Replies: 0
    • Views: 2,273
    09-23-2010, 07:33 PM Go to last post
  41. Help with VAR, SVAR model

    Hi, I have to plot impulse response function for my research paper and I have never studied vector autoregressive models. So I am hoping someone...

    Started by syedhussain84‎, 09-23-2010 06:04 PM
    • Replies: 0
    • Views: 2,551
    09-23-2010, 06:04 PM Go to last post
  42. ANOVA table insignificant in Regression

    Greetings!!! Regression analysis produced ANOVA table insignificant. Please confirm if I should report regression results. Thanks Rayyan

    Started by itsrayyan‎, 09-19-2010 04:51 PM
    • Replies: 6
    • Views: 12,951
    09-23-2010, 04:43 PM Go to last post
  43. Question Using Odd values for variable selection in logistic regression

    Hello, I have a question about independent variables selection when a logistic regression is used as classification method. Is it an acceptable or...

    Started by Ziyad‎, 09-22-2010 12:05 PM
    • Replies: 0
    • Views: 2,676
    09-22-2010, 12:05 PM Go to last post
  44. Testing IIA in MNLM with Hausman-McFadden

    Dear all, I'm having some problems with the IIA property violation test of Hausman McFadden. I estimated two MNL models based on 3 predictors:...

    Started by Roel‎, 09-22-2010 08:35 AM
    • Replies: 0
    • Views: 3,141
    09-22-2010, 08:35 AM Go to last post
  45. Plotting output from logistic regression???

    I ran a quasi-likelihood logistic regression using S-plus and have a question about how to plot and interpret the results. How can I construct...

    Started by Boxor‎, 09-21-2010 05:35 PM
    • Replies: 0
    • Views: 3,885
    09-21-2010, 05:35 PM Go to last post
  46. multivarient nonlinear regression in SPSS

    is there are way of doing this in SPSS? I have looked around and come to a blank... I need to derive an equation to describe the (most likely...

    Started by E_J‎, 09-21-2010 08:58 AM
    • Replies: 0
    • Views: 3,896
    09-21-2010, 08:58 AM Go to last post
  47. Descriptive research and regression analysis?

    Please pardon my ignorance...can I use multiple regression analysis in a descriptive research design to answer my hypotheses? If not, can anyone...

    Started by reakhavok‎, 09-18-2010 01:53 PM
    • Replies: 4
    • Views: 8,395
    09-19-2010, 01:11 PM Go to last post
  48. disattenuated correlations

    Objective: a guess about the actual correlations between two variables based on correlations between somewhat noisy variable estimates. The variable...

    Started by Per‎, 09-18-2010 01:39 AM
    • Replies: 0
    • Views: 4,084
    09-18-2010, 01:39 AM Go to last post
  49. How do i create "nice" prediction hyperbola?

    I would like to create a nice prediction hyperbola in my regression analysis, at this moment i am only getting some rather ugly ones and only where i...

    Started by thedreamshaper‎, 09-16-2010 02:28 PM
    • Replies: 3
    • Views: 3,568
    09-16-2010, 03:55 PM Go to last post
  50. Standard error of regression

    I am writing a robust regression algorith in Python and using the linregress method from SciPy/NumPy. linregress returns the b0, b1, r^2, p_val, and...

    Started by strimp099‎, 09-16-2010 12:18 PM
    • Replies: 2
    • Views: 6,272
    09-16-2010, 02:35 PM Go to last post
  51. Low R-squared, but my variables fit expectations

    So I ran a regression on 3 different sets of data estimation techniques versus actual survey data. The dependent variable was the non-survey...

    Started by dontpunkme‎, 09-10-2010 09:40 PM
    • Replies: 1
    • Views: 13,676
    09-16-2010, 10:55 AM Go to last post
  52. Four-way interaction in linear regression

    Dear all, I have 4 independent variables, and I want to check their combined and interrelated effects on 1 dependent variable (thus 1 y and 4...

    Started by paul de boer‎, 09-08-2010 02:44 PM
    • Replies: 2
    • Views: 9,870
    09-14-2010, 01:33 PM Go to last post
  53. Comparing model fits of non nested models

    Dear all, I am a student in Sociology at the University of Amsterdam and currently working on a paper on which I got stuck. Let me briefly...

    Started by thaiz‎, 09-14-2010 02:56 AM
    • Replies: 0
    • Views: 3,930
    09-14-2010, 02:56 AM Go to last post
  54. Constant Variable

    Hi folks, I was wondering if you could help me understand a problem I have with a regression. Basically, SPSS excludes one of my variables...

    Started by blastStu‎, 09-13-2010 03:58 AM
    • Replies: 2
    • Views: 17,668
    09-13-2010, 12:38 PM Go to last post
  55. Participant ID - Categorical?

    Hi all, I'm performing a Binary Logistic Regression on data from human subjects. I want to ensure that the effect of independent variables is...

    Started by blastStu‎, 09-13-2010 09:44 AM
    • Replies: 0
    • Views: 4,002
    09-13-2010, 09:44 AM Go to last post
  56. "No Observations"

    Hi, I was hoping someone might be able to help solve this problem. The values are all formatted as numeric. I'm regressing news announcements on...

    Started by CharlesOG‎, 09-13-2010 05:46 AM
    • Replies: 1
    • Views: 2,490
    09-13-2010, 07:57 AM Go to last post
  57. Time Series Analysis with lags and non temporally consecutive values

    This is what i'm trying to do. Ive got a set of news surprise data (announced value-forecast) at the times of release. For example, I have 12 GDP...

    Started by CharlesOG‎, 09-12-2010 07:38 PM
    • Replies: 0
    • Views: 2,729
    09-12-2010, 07:38 PM Go to last post
  58. standardizing residuals

    Hi All, I'd like to standardize residuals. Can anybody tell me the formula to standardize to mean 0 and standard deviation 1? I also do not...

    Started by cincan‎, 09-09-2010 04:05 PM
    • Replies: 3
    • Views: 5,585
    09-10-2010, 04:35 AM Go to last post
  59. Need help badly!

    You have the ramp-servicing contract for a midsize car wash. For wash workers you use predominantly part time workers, all of whom have sufficient...

    Started by charterpilot‎, 09-08-2010 10:46 PM
    • Replies: 4
    • Views: 4,530
    09-09-2010, 03:49 PM Go to last post
  60. BOX-COX transformation - Correct method

    Dear All, I fitted a quadratic model to a set of data. I am trying to apply the box-cox transformation to check if my data should be transformed....

    Started by Clovis‎, 08-05-2010 06:31 AM
    • Replies: 2
    • Views: 10,395
    09-08-2010, 09:44 AM Go to last post

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