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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. have a .por file, no spss, need to run analysis by tomorrow

    Hi all.. I thought I could open the .por file I have on my home computer but it turns out the version I have doesn't open a file like this with more...

    Started by Empathy‎, 11-23-2009 09:13 PM
    • Replies: 0
    • Views: 3,466
    11-23-2009, 09:13 PM Go to last post
  2. Analysis of data set derived from simulation

    I'm an engineer working for an architecture firm, and I'm currently trying to analyze some data I've derived from a parametric building simulation I...

    Started by jeemang‎, 11-19-2009 06:50 PM
    • Replies: 0
    • Views: 1,786
    11-19-2009, 06:50 PM Go to last post
  3. Multiple Regression Help

    Hi, I'm currently working on an assignment in which I have to run a multiple regression, however I am a little confused regarding the order of the...

    Started by boogers‎, 11-12-2009 05:20 PM
    • Replies: 1
    • Views: 1,974
    11-13-2009, 08:02 AM Go to last post
  4. Exclamation Problem interpreting Multiple Regression on Video Game Sales

    Hi everyone, I am a new member, I am so glad to have found the forum. I'm tearing my hair out about this problem. These are my results: ...

    Started by aplfalcon‎, 11-09-2009 10:17 PM
    • Replies: 3
    • Views: 4,613
    11-11-2009, 04:28 PM Go to last post
  5. How many IVs can I use?

    I am hoping to publish the results of this in a journal (not a statistics one, an experimental science one). I have a sample size of 71...

    Started by BrenH‎, 11-05-2009 01:00 AM
    • Replies: 2
    • Views: 2,760
    11-11-2009, 04:08 PM Go to last post
  6. using prediction results in a separate model

    hello! I'm looking for some feedback on an idea, if you're interested. The issue at hand is how to deal with the variable "age" as a predictor of...

    Started by phoebe‎, 11-05-2009 04:20 PM
    • Replies: 1
    • Views: 1,927
    11-07-2009, 05:48 PM Go to last post
  7. Multiple Regression Interaction

    Figured it out, thanks!

    Started by jamesmartinn‎, 11-05-2009 02:54 PM
    • Replies: 0
    • Views: 2,273
    11-05-2009, 02:54 PM Go to last post
  8. Post ANCOVA controversy?

    Hello all, I have a question regarding ANCOVA, which seems straightforward, however an answer has eluded me. The question is: Can a...

    Started by jhdc‎, 10-31-2009 04:43 PM
    • Replies: 3
    • Views: 11,534
    11-03-2009, 08:30 PM Go to last post
  9. Standard Error of Coefficients in Multiple Regression

    Hi, I have built a model in Excel to do Multiple Regression. I am able to correctly calculate the intercept and the regression coefficients but I...

    Started by JoeA838‎, 10-26-2009 02:08 PM
    • Replies: 1
    • Views: 13,366
    10-26-2009, 02:49 PM Go to last post
  10. Logistic regression null values

    I think I know the answer, but just confirming. I'm doing a multiple logistic regression with 15 predictor variables. Must ALL values of the...

    Started by jawon‎, 10-21-2009 05:30 PM
    • Replies: 0
    • Views: 3,422
    10-21-2009, 05:30 PM Go to last post
  11. scale issues

    Please look at the following descriptive labels for a scale of importance. Extremely critical (7) Highly important (6) Very Important (5) ...

    Started by Dr.Appalayya‎, 10-17-2009 04:53 AM
    • Replies: 4
    • Views: 2,297
    10-19-2009, 08:11 AM Go to last post
  12. Latent growth process

    Hi, I'm starting a study investigating the use of several medical imaging measurements taken pre-treatment to predict treatment outcome. Treatment...

    Started by parkej‎, 10-15-2009 03:51 PM
    • Replies: 0
    • Views: 1,431
    10-15-2009, 03:51 PM Go to last post
  13. Time-series analysis with three variables

    :wave:I have some time-series across three variables. I want to see the association of two variables while controlling for a third. I am using SPSS...

    Started by jimd@uic.edu‎, 10-13-2009 08:26 AM
    • Replies: 0
    • Views: 3,042
    10-13-2009, 08:26 AM Go to last post
  14. Linear regression analysis - Urgent assistance required

    Hi I am trying to examine the relation between ad. liking and attitude towards the brand. My hypothesis H1: "Commercials that are liked will...

    Started by bulu‎, 10-09-2009 06:14 PM
    • Replies: 6
    • Views: 4,295
    10-11-2009, 04:10 AM Go to last post
  15. Question what is: correlation? regression? confidence?

    I need to learn statistics for a project I'm working on. I am totally lost and am spending more time than I thought I would on trying to understand...

    Started by brad henrie‎, 10-08-2009 08:38 PM
    • Replies: 1
    • Views: 4,483
    10-09-2009, 03:40 AM Go to last post
  16. Beta coefficients in multiple regression

    Hi guys. I have a question about beta coefficients that are calculated for standard multiple linear regression procedure. I kind of don't...

    Started by kobylkinks‎, 01-30-2009 04:02 AM
    • Replies: 4
    • Views: 20,694
    10-06-2009, 09:35 AM Go to last post
  17. Question Classification Rate of Multivariate Logistic Regression

    Hello, I'm running a binary (2 groups), multivariate (multiple predictors) logistic regression analysis, and would like to test the classification...

    Started by eyeballjunk‎, 09-28-2009 09:10 AM
    • Replies: 1
    • Views: 4,641
    09-29-2009, 03:01 PM Go to last post
  18. How do I do this calculation

    Hi all, I am a mature student and just dont get how to do what most around me take as simple calculations This is from a coefficients table where...

    Started by kay2000‎, 09-20-2009 08:40 PM
    • Replies: 1
    • Views: 2,110
    09-20-2009, 09:14 PM Go to last post
  19. Error estimates with r2 in linear regression

    I have been given the results of some regression analysis, where some variable y is a function of x1 and x2. I have a r2 value for the analysis, and...

    Started by mh8782‎, 09-18-2009 04:29 AM
    • Replies: 2
    • Views: 2,719
    09-18-2009, 09:44 AM Go to last post
  20. Can I use mediation with my data?

    Thanks for taking the time to read this in advance it is quite detailed, but I'm currently working on my psychology honours dissertation, and due to...

    Started by kristy008‎, 09-12-2009 10:08 PM
    • Replies: 2
    • Views: 3,001
    09-13-2009, 01:27 AM Go to last post
  21. predicting X using multiple regression?

    Hello: I have been reviewing a study in which Multiple Linear Regression (MLR) was used to evaluate the relationship between the concentration of...

    Started by AquaMan‎, 09-11-2009 04:56 PM
    • Replies: 0
    • Views: 1,901
    09-11-2009, 04:56 PM Go to last post
  22. I need to understand regression analysis. Please Help

    Hi guys i need help badly. We were given this to solve in my first RA class and i have no idea how to begin. Please this is the first time i'm...

    Started by henryneo‎, 09-01-2009 10:07 AM
    • Replies: 2
    • Views: 2,944
    09-06-2009, 09:00 PM Go to last post
  23. mahalanobis distance critical values > 10 df

    dear all, analysing my dataset (N=1056) with SPSS for my Ph.D., I'm currently testing with linear multiple regression. before entering a...

    Started by hbos‎, 09-03-2009 09:58 AM
    • Replies: 0
    • Views: 9,983
    09-03-2009, 09:58 AM Go to last post
  24. help with interpretation of multiple regression results

    Dear forum members, I am running multiple regressions with SPSS and I need help with possible interpretation of my results. Firm...

    Started by metanex‎, 09-03-2009 02:19 AM
    • Replies: 0
    • Views: 3,089
    09-03-2009, 02:19 AM Go to last post
  25. Moderation graphs

    Hi all, (I hope I'm posting this in the right sub-forum) I have two data sets for which I've done hierarchical regression analysis to test for...

    Started by darc‎, 09-02-2009 06:10 AM
    • Replies: 0
    • Views: 11,725
    09-02-2009, 06:10 AM Go to last post
  26. Problem with small amount of cases

    Hi New here, and fairly new with statistics. I have a problem with too few cases, but more than enough variables and observations. I have no...

    Started by Cai‎, 08-16-2009 11:47 AM
    • Replies: 5
    • Views: 2,228
    08-19-2009, 12:09 PM Go to last post
  27. Using Regression When Y = # Wins

    Hello, This is my first post, and so I apologize if this is a dumb question. I'm considering using multiple linear regression to predict Y = #...

    Started by GaryB‎, 08-18-2009 01:01 AM
    • Replies: 2
    • Views: 2,190
    08-18-2009, 04:43 PM Go to last post
  28. Dependent / conditional regression?

    Hi there! Long time lurker, first time poster (first post in ANY board), so my sincerest apologies if I'm doing anything wrong! I have searched...

    Started by Murphy-dk‎, 08-11-2009 05:23 AM
    • Replies: 0
    • Views: 1,811
    08-11-2009, 05:23 AM Go to last post
  29. relationship between test conditions and time to failure using linear regression

    Hello all, I'm Tom and i've decided it'd be a good idea to join this forum as i'm just about to start my third year of my degree in september; a Beng...

    Started by t0mmm‎, 08-04-2009 06:39 AM
    • Replies: 0
    • Views: 1,536
    08-04-2009, 06:39 AM Go to last post
  30. Smile Nonparametric multivariate survey analysis - suggestions please!

    Hi I'm about to start analysis on some educational survey data with the following predictor and response variables: PREDICTOR: age class (2...

    Started by Tabs‎, 08-01-2009 03:28 PM
    • Replies: 2
    • Views: 2,120
    08-02-2009, 04:27 PM Go to last post
  31. Which test to use?

    I have just learned that I chose the wrong test for my data and I am now at a total loss. Basically I sent out a questionnaire which had a likert...

    Started by 2461c‎, 07-28-2009 10:31 AM
    • Replies: 3
    • Views: 2,118
    08-01-2009, 02:44 AM Go to last post
  32. Wink Regression/Time Series

    Hello All:wave: I am looking for research help:yup: There is a data set and the goal is to build a model. There are events that happen....

    Started by iknowu99‎, 03-18-2009 03:55 PM
    • Replies: 11
    • Views: 4,774
    07-30-2009, 03:28 PM Go to last post
  33. Calculating Omega Squared

    Hi All I have been battling with my stats over the last two months and have managed, by reading books and researching the web, to stumble through...

    Started by 2461c‎, 07-26-2009 06:30 AM
    • Replies: 2
    • Views: 24,255
    07-28-2009, 10:25 AM Go to last post
  34. Ordinal Logistic Regression and Bimodality

    Hello, I'm running ordinal logistic regressions with survey weights. I was under the impression that there are no distributional assumptions for...

    Started by trafalgar‎, 07-24-2009 01:28 PM
    • Replies: 0
    • Views: 4,055
    07-24-2009, 01:28 PM Go to last post
  35. Simple Linear Regression with GUM Uncertainties

    I would appreciate it if someone could suggest some references that discuss how to formally incorporate measurement uncertainties (as calculated per...

    Started by Tom La Bone‎, 07-23-2009 04:31 PM
    • Replies: 0
    • Views: 3,908
    07-23-2009, 04:31 PM Go to last post
  36. Please explain differences between R and r

    Hello, I received my dissertation back with comments from the dean. He flagged the following text and added the following comments: Am I...

    Started by lph2005‎, 07-17-2009 11:48 PM
    • Replies: 0
    • Views: 7,536
    07-17-2009, 11:48 PM Go to last post
  37. Logistic regression vs multiple regression

    I have a 3 predictor variables that I am using to predict participation rates. How do I determine whether to use logistic regression or multiple...

    Started by Cohen's monkey‎, 07-15-2009 06:20 PM
    • Replies: 1
    • Views: 5,860
    07-15-2009, 07:54 PM Go to last post
  38. Factorial ANOVA

    I am not sure if what i am about to ask would make complete sense so let me start from the beginning. I'm doing research to measure five different...

    Started by jaanus_lallu‎, 07-11-2009 06:11 PM
    • Replies: 2
    • Views: 2,704
    07-15-2009, 06:49 AM Go to last post
  39. Web Analyst: Been a While Since I Touched Stats

    Hey everyone, I joined up to this site looking to get some advice. I have been doing web analytics for just over 2 years now. I have an...

    Started by JTWood‎, 07-06-2009 11:03 PM
    • Replies: 5
    • Views: 2,449
    07-08-2009, 08:23 PM Go to last post
  40. Attempting the Impossible? Please help!

    I've been tasked with conducting a statistical analysis and have encountered a few potentially significant problems. As its been quite some time...

    Started by carriedinterest‎, 07-07-2009 08:21 AM
    • Replies: 0
    • Views: 2,077
    07-07-2009, 08:21 AM Go to last post
  41. what is the best model to use?

    I have been working on this project for over 4 months. My model was approved by supervisor. The model was to run a multinomial logistic regression to...

    Started by squidly‎, 07-04-2009 09:18 AM
    • Replies: 1
    • Views: 1,793
    07-05-2009, 11:40 AM Go to last post
  42. Best laid plans...

    My thesis design was to give participants 2 tests. One measures a personal "type" and the other asks "opinions". My manipulation was to reverse...

    Started by Roadguru‎, 05-28-2009 10:21 PM
    • Replies: 12
    • Views: 3,339
    06-24-2009, 04:04 PM Go to last post
  43. Multiple chi-square or logistic regression?

    Hi, I'm new to statistics and am working on a project for work. I have read extensively and believe I am on the correct path, but would like to...

    Started by Chris Webber‎, 06-22-2009 08:54 AM
    • Replies: 1
    • Views: 6,265
    06-22-2009, 07:36 PM Go to last post
  44. variance-stabilizing transformation for simple linear regression

    studying for a test.. need some help. Consider a simple linear regression analysis with β0 and β1 both positive. Suppose that the mean of the...

    Started by hanelliot‎, 06-21-2009 12:07 PM
    • Replies: 1
    • Views: 3,576
    06-21-2009, 06:43 PM Go to last post
  45. Regression SS in multiple linear regression

    In MULTIPLE linear regression, is it still true that the regression sum of squares is equal to ∑ (Y_i hat -Y bar)^2 ??? My textbook defines...

    Started by kingwinner‎, 06-20-2009 07:04 AM
    • Replies: 3
    • Views: 5,054
    06-20-2009, 04:55 PM Go to last post
  46. Multiple linear regression: partial F-test

    "Suppose that in a MULTIPLE linear regression analysis, it is of interest to compare a model with 3 independent variables to a model with the same...

    Started by kingwinner‎, 06-18-2009 08:58 PM
    • Replies: 5
    • Views: 19,674
    06-20-2009, 11:32 AM Go to last post
  47. Sum of the residuals in multiple linear regression

    In my textbook, the following results are proved in the context of SIMPLE linear regression: ∑e_i = 0 ∑(e_i)(Y_i hat)= 0 I tried to modify the...

    Started by kingwinner‎, 06-20-2009 07:09 AM
    • Replies: 1
    • Views: 6,861
    06-20-2009, 07:28 AM Go to last post
  48. Cov in multiple linear regression

    For multiple linear regression model Y = Xβ + e, assume X is non-random. Assume Gauss-Markov assumptions hold. Show that variance-covariance matrix...

    Started by hanelliot‎, 06-19-2009 08:35 PM
    • Replies: 3
    • Views: 4,830
    06-19-2009, 09:32 PM Go to last post
  49. Poisson regression

    Hello, Is it possible to do a Poisson regression with only 6 observations? What is the minimum number of observations possible? Giovanna

    Started by Giovanna‎, 06-18-2009 05:48 AM
    • Replies: 0
    • Views: 2,905
    06-18-2009, 05:48 AM Go to last post
  50. Did I do this correctly?

    Hi, I am trying to forecast electric power demand for natural gas in the near future. A huge driver of electric power demand for natural gas on a...

    Started by naturallight‎, 06-12-2009 06:08 PM
    • Replies: 5
    • Views: 2,751
    06-15-2009, 07:01 PM Go to last post
  51. Regression Help

    OK, attached is the regression problem. It has multiple items to calculate. My problem is I am not sure if I calculated #1 and #2 correctly in...

    Started by TEE323‎, 06-07-2009 04:35 PM
    • Replies: 0
    • Views: 1,484
    06-07-2009, 04:35 PM Go to last post
  52. linear regression model: LSE, Var, Cov etc

    Studying for a test.. can anyone check my solutions for (a)-(c) and give me any help on (d)? Any help would be appreciated. Consider the model Yi...

    Started by hanelliot‎, 06-03-2009 02:42 PM
    • Replies: 2
    • Views: 11,459
    06-04-2009, 08:24 PM Go to last post
  53. Help Please.

    Suppose that you wish to use a linear regression to predict the dependent variable Y using the dependent variable X1. You collect a scatter plot of...

    Started by btnh33‎, 06-03-2009 06:06 PM
    • Replies: 0
    • Views: 1,743
    06-03-2009, 06:06 PM Go to last post
  54. hierarchical multiple regression

    Hi guys, I'm pretty clueless when it comes to stats, so I was wondering if you could help. I'm testing 2 competing theories on personality causes...

    Started by tori‎, 05-30-2009 09:55 PM
    • Replies: 0
    • Views: 2,603
    05-30-2009, 09:55 PM Go to last post
  55. Linear Regression: reversing the roles of X and Y

    Simple linear regression: Y = β0 + β1 *X + ε , where ε is random error Fitted (predicted) value of Y for each X is: ^ Y = b0 + b1 *X (e.g....

    Started by kingwinner‎, 05-25-2009 03:23 AM
    • Replies: 4
    • Views: 15,888
    05-27-2009, 10:39 AM Go to last post
  56. Linear Regression Models (2)

    β ε note: also under discussion in "Math Help Forum"

    Started by kingwinner‎, 05-14-2009 04:40 AM
    • Replies: 12
    • Views: 4,197
    05-22-2009, 03:35 PM Go to last post
  57. MLE problem, linear regression model

    Hey, im having trouble studying for an upcoming exam... the attached question is coming up a lot in recent exams and haven't got a solution for it...

    Started by qwertykeyboards‎, 05-20-2009 07:22 AM
    • Replies: 1
    • Views: 2,381
    05-20-2009, 07:31 AM Go to last post
  58. Linear Regression Models (3)

    β ε note: also under discussion in "Math Help Forum"

    Started by kingwinner‎, 05-14-2009 04:43 AM
    • Replies: 4
    • Views: 2,884
    05-19-2009, 08:03 PM Go to last post
  59. Linear Regression Models (1)

    1) "In regression models, there are two types of variables: X = independent variable Y = dependent variable Y is modeled as random. X is...

    Started by kingwinner‎, 05-14-2009 04:36 AM
    • Replies: 1
    • Views: 2,292
    05-19-2009, 08:02 PM Go to last post
  60. Interpreting a moderation effect

    Yesterday I submitted my firts thread but I learnt that it was too vague. I did my work but now I have some doubts interpreting a moderation effect....

    Started by Mariana Ramos‎, 04-29-2009 11:37 AM
    • Replies: 3
    • Views: 13,418
    05-07-2009, 01:50 AM Go to last post

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