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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. What means "1/X weighted multiple regression"

    What means 1/X weighted multiple regression? Is it just WLS with weights = "1/X" or I'm missing smth? :confused:

    Started by alex84‎, 12-11-2009 09:17 PM
    • Replies: 1
    • Views: 4,642
    12-12-2009, 01:42 PM Go to last post
  2. Need help - what model, what analysis?

    Hi all, please somebody help give me some direction... I have worked long and hard at trying to figure this out for days so please realize I'm not...

    Started by Empathy‎, 12-14-2009 04:53 PM
    • Replies: 1
    • Views: 2,273
    12-14-2009, 05:00 PM Go to last post
  3. NEED HELP on degrees of freedom!!!! URGENT

    Hello! I have finished my regression project and am writing my paper for a multiple regression model, but cannot seem to find in notes or online...

    Started by dshan‎, 12-15-2009 05:18 PM
    • Replies: 3
    • Views: 2,457
    12-15-2009, 06:17 PM Go to last post
  4. Cool Linear regression assumptions not met, now what?!

    Hi, I tried and tried but I could not meet the assumptions for linear regression (normal, linearity, independence, etc.). I have multiple...

    Started by Toulouse‎, 12-17-2009 07:32 PM
    • Replies: 5
    • Views: 13,741
    12-19-2009, 01:54 PM Go to last post
  5. Question Totally lost with regression equations

    Hi I have a dataset of 182 countries and I have to compare them with respect to GDP, energy consumption and Carbon dioxide emissions. How can I...

    Started by shah.manasi‎, 12-10-2009 01:48 PM
    • Replies: 1
    • Views: 2,085
    12-23-2009, 12:16 AM Go to last post
  6. Question Multiple Regression Query

    Hi, I'm an undergraduate psych student and have conducted a multiple regression for an assignment. This might seem like a simple question, but am a...

    Started by rach1234xx‎, 12-17-2009 12:12 PM
    • Replies: 1
    • Views: 2,218
    12-26-2009, 10:58 PM Go to last post
  7. Regression or LSD for discrete quantitative factor?

    I have a 2-factor factorial experiment where Factor A is quantitative and continuous with 2 levels (100 and 200). Factor B is quantitative, but...

    Started by brownmoses‎, 12-28-2009 12:55 PM
    • Replies: 0
    • Views: 2,963
    12-28-2009, 12:55 PM Go to last post
  8. Errors vs Residuasl in linear regression

    Hello, As far as i know in regression analysis the errors have all the same constant variance. On the other hand the residuals of the sameple that...

    Started by zarasandreas‎, 12-28-2009 03:03 PM
    • Replies: 0
    • Views: 1,897
    12-28-2009, 03:03 PM Go to last post
  9. Physiology grad student needing some help - linear regression through the origin

    Hi all. I'm a PhD student in physiology, and I seem to be suffering from mild amnesia when it comes to statistics. My old course notes are out of my...

    Started by Pascal‎, 01-04-2010 09:45 AM
    • Replies: 6
    • Views: 4,318
    01-06-2010, 04:43 AM Go to last post
  10. independent variable that is a distribution?

    Hi, I am attempting a logistic regression analysis with a binary response and explanatory variables measured at the individual level and also some...

    Started by seth‎, 01-10-2010 04:10 AM
    • Replies: 0
    • Views: 2,666
    01-10-2010, 04:10 AM Go to last post
  11. What is the history of regression analysis?

    Hi all, Recently, I am using regression analysis to do a geophysics study. Now the study is almost done. I start to write my report. I want to add...

    Started by ygao‎, 01-11-2010 04:40 PM
    • Replies: 4
    • Views: 12,282
    01-12-2010, 12:22 PM Go to last post
  12. Manually calculating weights for WLS

    *Posted in Stat Consulting but moved here b/c I think it's more fitting. Hi guys, I'm trying to figure out how to manually calculate the...

    Started by brett45‎, 01-13-2010 03:21 PM
    • Replies: 0
    • Views: 4,445
    01-13-2010, 03:21 PM Go to last post
  13. multiple regression help

    Hi guys, I was reading the following example from a book, but couldn't understand a couple of things. Could you help me out here? Here is the...

    Started by beemzet‎, 01-21-2010 02:21 PM
    • Replies: 1
    • Views: 2,300
    01-22-2010, 02:50 PM Go to last post
  14. Should I transform my scores?

    I am using correlation scores as the dependent variable in a multiple regression e.g. I am looking at which personality factors predict how well...

    Started by Lizzie_Liz‎, 02-01-2010 06:29 AM
    • Replies: 0
    • Views: 2,972
    02-01-2010, 06:29 AM Go to last post
  15. Geographically weighted regression (GWR)

    Hi, I am looking for some info on possibility of making a GW regression with a dependent variable as floating point numbers and independent...

    Started by Entomo‎, 02-02-2010 05:45 AM
    • Replies: 0
    • Views: 2,771
    02-02-2010, 05:45 AM Go to last post
  16. multiple regression analysis

    Hi There, I am conducting multiple regression analyses using SPSS. I have an outcome variable and several potential predictors, one of which is...

    Started by katypips‎, 02-02-2010 05:56 AM
    • Replies: 0
    • Views: 3,251
    02-02-2010, 05:56 AM Go to last post
  17. Correlation coefficients as a variable in a multiple regression?

    Hi I would like to do a multiple regression using correlation coefficients as my dependent variable - is this possible? Specifically the...

    Started by Lizzie_Liz‎, 01-26-2010 11:33 AM
    • Replies: 1
    • Views: 3,847
    02-02-2010, 10:35 PM Go to last post
  18. Arrow Multiple Linear Regression: How to Calculate the Coefficient

    This post has been deleted.

    Started by Draze‎, 02-02-2010 08:56 AM
    • Replies: 3
    • Views: 16,276
    02-08-2010, 12:03 PM Go to last post
  19. multiple logistic regression

    Hello, I want to build a multiple logistic regression and I would like to know what are the steps I need to do in order to buld the model (find...

    Started by lily‎, 02-18-2010 12:45 PM
    • Replies: 0
    • Views: 2,678
    02-18-2010, 12:45 PM Go to last post
  20. Regression Analysis - positive correlation

    Hi, I am running a regression analysis using data for aircraft values. The problem that I have encountered is that GDP global and Oil Price are...

    Started by Lukaszlukasz007‎, 02-18-2010 05:07 AM
    • Replies: 6
    • Views: 3,709
    02-19-2010, 04:13 AM Go to last post
  21. A question regarding missing variables

    Hey all, If you have missing values in your data set, how do you go about doing the statistical analysis? For example if you have a data chart...

    Started by moomoo345‎, 02-20-2010 06:57 PM
    • Replies: 2
    • Views: 2,302
    02-20-2010, 10:14 PM Go to last post
  22. Constant SE from covariance matrix on Multiple Regression

    Hi: I'm currently developing a Statistical package on Ruby, called statsample (http://ruby-statsample.rubyforge.org/), and I'm now working on...

    Started by clbustos‎, 02-18-2010 09:24 AM
    • Replies: 1
    • Views: 4,123
    02-22-2010, 01:47 AM Go to last post
  23. multiple regression- how to calculate b?

    If I'm given the means, standard deviations, and correlation coefficients of two independent variables and one dependent variable, how do I calculate...

    Started by mjtaylor‎, 02-23-2010 07:26 PM
    • Replies: 1
    • Views: 6,467
    02-23-2010, 10:03 PM Go to last post
  24. Question How to Calculate the Coefficient of Multiple Regression

    Hi Statistic Gurus I'm not really familar with multiple linear regression, and despite countless hours on google, I havn't found any clear...

    Started by Draze‎, 02-24-2010 04:33 AM
    • Replies: 2
    • Views: 10,458
    02-24-2010, 07:24 AM Go to last post
  25. multiple regression - mix of ordinal/continuous/dichotomous independent variables?

    I need to find relationships between one continuous dependent variable (hourly salary) and a number of ordinal (e.g. language skills which are ranked...

    Started by minnie2‎, 03-08-2010 03:52 AM
    • Replies: 0
    • Views: 5,967
    03-08-2010, 03:52 AM Go to last post
  26. Help with Regression Interpretation

    Hi - Thanks in advance for any help or advice on this! I know very little about statistics, but I have performed a multiple regression analysis in...

    Started by mchel_27‎, 03-09-2010 03:30 PM
    • Replies: 3
    • Views: 4,645
    03-11-2010, 08:57 AM Go to last post
  27. Nonlinear Multiple Regressions

    I have seven independent variables and would like to test their collective effect on a dependent variable. When I do a simple least squares...

    Started by tge496‎, 03-11-2010 09:12 PM
    • Replies: 0
    • Views: 2,881
    03-11-2010, 09:12 PM Go to last post
  28. Averages vs Totals in Multiple Regression - Simple Question

    Say in a multiple regression, I have three independent variables, each of which is the sum of 10 values (for ex: annual scores each year for a...

    Started by tge496‎, 03-12-2010 05:29 PM
    • Replies: 1
    • Views: 3,042
    03-12-2010, 08:15 PM Go to last post
  29. Salary survey. A type of ANOVA but which one?

    Ok here goes. I think this is needs a type of ANOVA but not sure which. I am designing a study to measure differences in salaries (DV) between...

    Started by lormak‎, 03-16-2010 03:44 AM
    • Replies: 1
    • Views: 2,499
    03-16-2010, 05:23 AM Go to last post
  30. R-square and interactions (multiple regression)

    Hi, I am doing a GLM regression analysis and have a question about interactions and model fit. My dependent variable is 'salary', and I have...

    Started by williaml‎, 03-16-2010 08:19 AM
    • Replies: 1
    • Views: 5,623
    03-16-2010, 08:50 PM Go to last post
  31. Linear Regression Proof

    Hello! Can anyone help me in writing a proof regarding linear regression? I do not know how to go about it. I have attached the document...

    Started by augustpolarbear‎, 03-19-2010 08:41 PM
    • Replies: 1
    • Views: 6,804
    03-19-2010, 09:02 PM Go to last post
  32. Exclamation Linear Regression - About R-squared and slope

    My question is that why low or high R-squared has no bearing on whether the estimated slope has a causal interpretation. My explanation is because...

    Started by non-sleeper‎, 03-20-2010 12:01 PM
    • Replies: 0
    • Views: 7,432
    03-20-2010, 12:01 PM Go to last post
  33. Multiple Regression and Likert Scale Data

    With multiple regression, is it necessary to recode independent variables that are measured using Likert Scale responses into dummy variables (with...

    Started by graduate32‎, 03-21-2010 12:10 AM
    • Replies: 2
    • Views: 30,167
    03-25-2010, 10:03 AM Go to last post
  34. Mixed Model: Between Subjects (Continuous) Within Subjects (4 Levels)

    Hi everyone, I'm trying to test a model with a between subjects variable (continuous) and a within subject variable (with 4 levels) in predicting a...

    Started by gheffo‎, 03-25-2010 02:05 PM
    • Replies: 0
    • Views: 5,431
    03-25-2010, 02:05 PM Go to last post
  35. Ordinary/Conditional Least Squares vs. Maximum Likelihood

    Can anyone explain in layman's terms when we should use maximum likelihood as opposed to ordinary or conditional least squares for regression or time...

    Started by krez‎, 03-26-2010 12:38 PM
    • Replies: 0
    • Views: 4,780
    03-26-2010, 12:38 PM Go to last post
  36. Isolating Independent Variables

    Question 1: How do I isolate an independent variable? Question 2: Once I know the independent variables impact how do I remove it from a timeline...

    Started by rwoolley‎, 03-26-2010 02:02 PM
    • Replies: 0
    • Views: 5,025
    03-26-2010, 02:02 PM Go to last post
  37. A good text on generalised linear models?

    Does anyone have any good recommendations on texts on generalised linear models without matrix notation? Cheers.

    Started by .ACS.‎, 03-28-2010 12:17 PM
    • Replies: 2
    • Views: 3,044
    03-28-2010, 03:01 PM Go to last post
  38. p-value and conditional heteroskedasticity

    Hello, conditional heteroskedasticity affects the standard error coefficient (in a t-test, multiple regression), but does not affect the...

    Started by keeskkool‎, 04-02-2010 02:54 PM
    • Replies: 0
    • Views: 4,737
    04-02-2010, 02:54 PM Go to last post
  39. Linear regression- If you ever wanted a chance to save somebody's life...this is it!

    Hi guys, I will be forever grateful for some help with SPSS and linear regression. Here is my data set: -I have questionnaire data from...

    Started by melsuett‎, 04-02-2010 05:25 PM
    • Replies: 1
    • Views: 2,984
    04-02-2010, 06:10 PM Go to last post
  40. Standard error of the conditional mean

    Hi, Will somebody please show me how to derive the formula to compute the standard error of the conditional mean in multiple linear regression? ...

    Started by hereiamat‎, 04-05-2010 09:34 AM
    • Replies: 0
    • Views: 3,154
    04-05-2010, 09:34 AM Go to last post
  41. DV Transformation Changes Sign of Correlation in Regression

    Hi Everybody, I've run into an issue with my data and was hoping this community might have some ideas. I am running several multiple...

    Started by evaporated3‎, 04-06-2010 10:44 AM
    • Replies: 0
    • Views: 2,589
    04-06-2010, 10:44 AM Go to last post
  42. Post Multiple Regression

    Hi, I'm completing my independant study on the exploration of family structure and health behaviours. After coding my data I have my independent...

    Started by rachylaura‎, 04-06-2010 03:19 PM
    • Replies: 0
    • Views: 2,393
    04-06-2010, 03:19 PM Go to last post
  43. Question Partial Correlation vs. Multiple Regression

    What is the purpose of doing JUST a partial correlation as opposed to a full multiple regression? (In cases where there is a clear outcome variable.)...

    Started by ionpattern‎, 03-12-2010 10:50 AM
    • Replies: 2
    • Views: 8,968
    04-07-2010, 08:40 AM Go to last post
  44. Binary Logistic Regression with Multiple Data Points

    Does anybody know how to run a regression on binary outcome data, with categorical predictors, where multiple subjects each have multiple outcome...

    Started by newtostats13‎, 04-09-2010 01:03 PM
    • Replies: 1
    • Views: 4,677
    04-10-2010, 04:26 AM Go to last post
  45. Question Unstandardized regression coefficients

    Hi all (first post :wave:), I've recently encountered some problems regarding unstandardized (partial) regression coefficients in my coursework. ...

    Started by friendlouis‎, 04-11-2010 02:21 AM
    • Replies: 0
    • Views: 6,988
    04-11-2010, 02:21 AM Go to last post
  46. Need help with question

    Hye there.I'm new here and joined because needed help with some stats problems.I need help with a problem given below S= 183+0.4122Yi-5926Gi...

    Started by new2stats‎, 04-12-2010 12:03 PM
    • Replies: 3
    • Views: 2,432
    04-12-2010, 04:13 PM Go to last post
  47. Need HELP!... building a multible linear regression model

    Dear all, i am not sure which variables and model I should choose for the following question, which is part 7 of a research, since I think almost all...

    Started by benjam1n‎, 04-16-2010 08:36 AM
    • Replies: 0
    • Views: 2,091
    04-16-2010, 08:36 AM Go to last post
  48. Non parametric equivalent to multiple regression?

    Hi everyone! My sample size is only 15. Is there a nonparametric equivalent to multiple regression? I have five predictors which correlate (using...

    Started by angoslezq‎, 04-17-2010 06:24 AM
    • Replies: 2
    • Views: 9,722
    04-17-2010, 08:26 PM Go to last post
  49. Any data transformation needed for Pearson and Multiple regression?

    I want to run a Pearson's r and also multiple regresssion between a DV and some IVs. The DV is measured in percentages as well as some of my IVs. The...

    Started by angoslezq‎, 04-19-2010 01:14 PM
    • Replies: 0
    • Views: 2,898
    04-19-2010, 01:14 PM Go to last post
  50. Multiple linear regression = conditional sampling?

    Hi all! I have read somewhere that when we have n jointly normally distributed variables there is an alternative to 'standard' conditional sampling....

    Started by Maverick85‎, 04-20-2010 12:39 PM
    • Replies: 0
    • Views: 2,015
    04-20-2010, 12:39 PM Go to last post
  51. Now sure what to do now (4 variables, no interaction, significant correlated)

    Hello everybody - I am in need of some statistical help as I'm a bit confused as to what to do next. I'll give you a rundown of my situation: I've...

    Started by CedricFP‎, 04-09-2010 06:56 AM
    • Replies: 7
    • Views: 5,414
    04-22-2010, 11:26 AM Go to last post
  52. Struggling to interpret a result of standard multiple regression

    Hi there, I am studying 4th year statistics in psychology. I am doing an assignment which required me to form composite variables from a large...

    Started by hochie‎, 04-23-2010 07:26 PM
    • Replies: 2
    • Views: 3,163
    04-25-2010, 10:13 PM Go to last post
  53. Stepwise Regression

    Let Y = Company Sales X1 = Overall Industry Sales X2 = Advertising Expenditure X3 = Special Promotion by Competitor (0 = Yes, 1 = No) Using...

    Started by doctorwho‎, 04-24-2010 08:47 PM
    • Replies: 2
    • Views: 5,885
    04-26-2010, 02:30 PM Go to last post
  54. Help with Regression Equation

    Hi, Basically I need help working out all the variables for a multiple regression equation. The equation used is: Y= X1 R1 + X2 R2 +....Xn Rn +...

    Started by billkarr‎, 04-27-2010 09:30 AM
    • Replies: 2
    • Views: 3,741
    04-27-2010, 10:49 AM Go to last post
  55. Testing Multiple Regression Coefficients

    Hi, I have a multiple regression equation with 11 or 12 independent variables. Two of these variables are our main explanatory variables. As...

    Started by jj100‎, 04-29-2010 10:46 PM
    • Replies: 0
    • Views: 2,610
    04-29-2010, 10:46 PM Go to last post
  56. R^2 for linear multiple linear regression

    I have two candidates for a linear regression model on y, say x_1, and x_2. So I get two linear regression model for each (b_i*x_i+a_i+e_i) each...

    Started by raver_68‎, 05-11-2010 05:00 PM
    • Replies: 5
    • Views: 7,539
    05-12-2010, 04:25 PM Go to last post
  57. How to test INTERACTION

    HI THERE, I have started recently using the multiple regression, I am runing now a model where I have 2 continous independent variables, and 4...

    Started by Avatar‎, 05-14-2010 05:28 PM
    • Replies: 3
    • Views: 3,547
    05-15-2010, 09:22 PM Go to last post
  58. 1way anova to do multiple comparisons on dichotomous dv

    Greetings! I wanted to quickly reference with someone who may know more about logistic type analyses. I am doing an analysis of a very large...

    Started by cdo‎, 05-18-2010 05:25 PM
    • Replies: 0
    • Views: 3,143
    05-18-2010, 05:25 PM Go to last post
  59. Overall significance test of a multiple regression...

    Hey all, I've been puzzling over this for some hours and I've tried many various methods from various text books, I think I must be missing...

    Started by ryanjones102‎, 05-19-2010 08:44 PM
    • Replies: 1
    • Views: 16,434
    05-20-2010, 11:22 AM Go to last post
  60. multiple regression sample

    Hello, I am undertaking a small project for some course work. I am using a multiple regression with 4 predictors. I have a histogram which doesn't...

    Started by stoner222‎, 05-24-2010 10:07 AM
    • Replies: 1
    • Views: 3,065
    05-25-2010, 12:21 PM Go to last post

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