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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Non linear regression and under-/overvaluation calc.

    As you know the Security Market Line is used to find under- or overvalued securities (if they plot below or above the SML). I am doing something...

    Started by Capslock‎, 07-04-2010 11:31 PM
    • Replies: 0
    • Views: 1,538
    07-04-2010, 11:31 PM Go to last post
  2. Want to regress (statistically), but can it be done?

    I have population size over time with many gaps (the unfortunate reality of many biological data sets!): there are only 12 points over 37 years. ...

    Started by canis11‎, 06-29-2010 10:05 AM
    • Replies: 2
    • Views: 2,483
    06-29-2010, 01:43 PM Go to last post
  3. Spurious?

    Hi there! If i am doing a multiple linear regression in SPSS, and have a model where: 1.Market orientation -> Information Quality...

    Started by GetItDone‎, 06-28-2010 12:00 PM
    • Replies: 0
    • Views: 2,184
    06-28-2010, 12:00 PM Go to last post
  4. Additive regression question

    Currently, I'm trying to create a regression equation that can help my boss predict employee hours for the upcoming month. Basically, if we already...

    Started by treystasio‎, 06-21-2010 08:31 PM
    • Replies: 3
    • Views: 2,916
    06-25-2010, 01:54 PM Go to last post
  5. linear regression short easy question

    Hi there, I have the response Y and some covariates. I want to do linear regression. Among the covariates there is the covariate sex (1: male,...

    Started by leo nidas‎, 06-21-2010 06:32 PM
    • Replies: 7
    • Views: 3,943
    06-22-2010, 10:46 AM Go to last post
  6. Question Calculating prediction intervals (error estimates of specific predicted points) in a

    Hi all, this is my first post here so please let me know if I need to provide more details. I want to generate a multivariate logistic regression...

    Started by bernoulli‎, 06-18-2010 03:48 PM
    • Replies: 6
    • Views: 13,954
    06-22-2010, 01:01 AM Go to last post
  7. Question Multiple Regression analysis for dependent variable with multiple dimensions..

    Hi All, with respect to Multiple Regression Analysis, is it possible to regress 6 dependent variable dimensions against 1 independent variable? ...

    Started by sachitha‎, 06-16-2010 12:55 AM
    • Replies: 2
    • Views: 5,946
    06-16-2010, 01:56 PM Go to last post
  8. Multiple Regression, Collinearity Question

    Hello All, I'm running a multiple regression on 8 predictors. A few of the predictors have positive correlations with the response, however their...

    Started by JohnnyBDoe‎, 06-15-2010 05:50 PM
    • Replies: 1
    • Views: 4,429
    06-15-2010, 06:55 PM Go to last post
  9. Multiple DVs

    Hey all, I've been tasked with determining the "best" IV (various demographics) for predicting overall purchase behavior, as determined by...

    Started by justcallmeerik‎, 06-07-2010 03:38 PM
    • Replies: 1
    • Views: 3,444
    06-12-2010, 12:50 AM Go to last post
  10. Gauss-Markov: Assumption no.5.

    "Correlation between independent variables and the error term is 0". How do i check this (in SPSS)? I know this is basically the same as the...

    Started by GetItDone‎, 06-09-2010 03:08 PM
    • Replies: 1
    • Views: 5,276
    06-09-2010, 03:34 PM Go to last post
  11. Unhappy assumption of independence

    Why is it important that cases are independent in regression (especially, logistic regression)? By "independent" i mean that observations under...

    Started by reductico‎, 06-09-2010 09:35 AM
    • Replies: 5
    • Views: 16,634
    06-09-2010, 02:04 PM Go to last post
  12. [Help -please!] Multiple Regression Model

    all done now

    Started by doomedromance‎, 06-05-2010 02:35 AM
    • Replies: 1
    • Views: 2,843
    06-05-2010, 04:55 PM Go to last post
  13. Linear regression with repeated measures

    Hi, I have the following question: I have a dataset that contains data from 9 subjects that were tested twice for a couple variables. I try to do a...

    Started by Jurriaan‎, 09-12-2008 09:05 AM
    • Replies: 2
    • Views: 6,973
    06-05-2010, 12:20 AM Go to last post
  14. Regression brain teaser

    I have data for 100 farm ponds. I have data for 4 variables: pollution in the pond, number of cows that graze near the pond, number of pigs that...

    Started by Lake scientist‎, 06-01-2010 03:26 PM
    • Replies: 3
    • Views: 4,028
    06-03-2010, 07:41 PM Go to last post
  15. Combining linear regressions

    I have two variables, x and y, and I am using linear regression to predict y from x over a large set of subjects. There are multiple observations per...

    Started by aix‎, 06-01-2010 02:48 PM
    • Replies: 0
    • Views: 2,962
    06-01-2010, 02:48 PM Go to last post
  16. Linear Regression Underestimating Sales Forecast

    Guys, I want to share a flawed method i've been dealing with. I am currently using linear regression to find the coefficent of Year-over-year...

    Started by rwd5013‎, 05-27-2010 07:59 PM
    • Replies: 4
    • Views: 4,971
    05-28-2010, 07:59 AM Go to last post
  17. 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: 3,046
    05-25-2010, 12:21 PM Go to last post
  18. 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: 16,374
    05-20-2010, 11:22 AM Go to last post
  19. 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: 3,119
    05-18-2010, 05:25 PM Go to last post
  20. 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: 3,527
    05-15-2010, 09:22 PM Go to last post
  21. 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: 7,487
    05-12-2010, 04:25 PM Go to last post
  22. 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: 2,596
    04-29-2010, 10:46 PM Go to last post
  23. 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: 3,697
    04-27-2010, 10:49 AM Go to last post
  24. 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: 5,840
    04-26-2010, 02:30 PM Go to last post
  25. 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: 3,147
    04-25-2010, 10:13 PM Go to last post
  26. 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: 5,385
    04-22-2010, 11:26 AM Go to last post
  27. 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: 1,999
    04-20-2010, 12:39 PM Go to last post
  28. 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: 2,869
    04-19-2010, 01:14 PM Go to last post
  29. 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: 9,677
    04-17-2010, 08:26 PM Go to last post
  30. 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: 2,074
    04-16-2010, 08:36 AM Go to last post
  31. 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: 2,417
    04-12-2010, 04:13 PM Go to last post
  32. 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: 6,957
    04-11-2010, 02:21 AM Go to last post
  33. 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: 4,656
    04-10-2010, 04:26 AM Go to last post
  34. 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: 8,913
    04-07-2010, 08:40 AM Go to last post
  35. 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: 2,383
    04-06-2010, 03:19 PM Go to last post
  36. 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: 2,557
    04-06-2010, 10:44 AM Go to last post
  37. 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: 3,129
    04-05-2010, 09:34 AM Go to last post
  38. 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: 2,963
    04-02-2010, 06:10 PM Go to last post
  39. 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: 4,706
    04-02-2010, 02:54 PM Go to last post
  40. 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: 3,017
    03-28-2010, 03:01 PM Go to last post
  41. 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: 4,994
    03-26-2010, 02:02 PM Go to last post
  42. 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: 4,757
    03-26-2010, 12:38 PM Go to last post
  43. 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: 5,379
    03-25-2010, 02:05 PM Go to last post
  44. 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: 30,025
    03-25-2010, 10:03 AM Go to last post
  45. 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: 7,394
    03-20-2010, 12:01 PM Go to last post
  46. 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: 6,775
    03-19-2010, 09:02 PM Go to last post
  47. 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: 5,595
    03-16-2010, 08:50 PM Go to last post
  48. 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: 2,481
    03-16-2010, 05:23 AM Go to last post
  49. 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: 3,014
    03-12-2010, 08:15 PM Go to last post
  50. 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: 2,869
    03-11-2010, 09:12 PM Go to last post
  51. 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: 4,598
    03-11-2010, 08:57 AM Go to last post
  52. 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: 5,931
    03-08-2010, 03:52 AM Go to last post
  53. 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: 10,409
    02-24-2010, 07:24 AM Go to last post
  54. 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: 6,433
    02-23-2010, 10:03 PM Go to last post
  55. 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: 4,094
    02-22-2010, 01:47 AM Go to last post
  56. 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: 2,281
    02-20-2010, 10:14 PM Go to last post
  57. 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: 3,680
    02-19-2010, 04:13 AM Go to last post
  58. 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: 2,645
    02-18-2010, 12:45 PM Go to last post
  59. 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: 16,154
    02-08-2010, 12:03 PM Go to last post
  60. 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: 3,811
    02-02-2010, 10:35 PM Go to last post

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