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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...

• Replies: 0
• Views: 1,538
07-04-2010, 11:31 PM
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. ...

• Replies: 2
• Views: 2,483
06-29-2010, 01:43 PM
3. ### Spurious?

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

• Replies: 0
• Views: 2,184
06-28-2010, 12:00 PM

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...

• Replies: 3
• Views: 2,916
06-25-2010, 01:54 PM
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,...

• Replies: 7
• Views: 3,943
06-22-2010, 10:46 AM
6. ### 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...

• Replies: 6
• Views: 13,954
06-22-2010, 01:01 AM
7. ### 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? ...

• Replies: 2
• Views: 5,946
06-16-2010, 01:56 PM
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...

• Replies: 1
• Views: 4,429
06-15-2010, 06:55 PM
9. ### Multiple DVs

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

• Replies: 1
• Views: 3,444
06-12-2010, 12:50 AM
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...

• Replies: 1
• Views: 5,276
06-09-2010, 03:34 PM
11. ### assumption of independence

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

• Replies: 5
• Views: 16,634
06-09-2010, 02:04 PM
12. ### [Help -please!] Multiple Regression Model

all done now

• Replies: 1
• Views: 2,843
06-05-2010, 04:55 PM
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...

• Replies: 2
• Views: 6,973
06-05-2010, 12:20 AM
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...

• Replies: 3
• Views: 4,028
06-03-2010, 07:41 PM
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...

• Replies: 0
• Views: 2,962
aix
06-01-2010, 02:48 PM
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...

• Replies: 4
• Views: 4,971
05-28-2010, 07:59 AM
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...

• Replies: 1
• Views: 3,046
05-25-2010, 12:21 PM
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...

• Replies: 1
• Views: 16,374
05-20-2010, 11:22 AM
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...

• Replies: 0
• Views: 3,119
cdo
05-18-2010, 05:25 PM
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...

• Replies: 3
• Views: 3,527
05-15-2010, 09:22 PM
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...

• Replies: 5
• Views: 7,487
05-12-2010, 04:25 PM
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...

• Replies: 0
• Views: 2,596
04-29-2010, 10:46 PM
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 +...

• Replies: 2
• Views: 3,697
04-27-2010, 10:49 AM
24. ### Stepwise Regression

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

• Replies: 2
• Views: 5,840
04-26-2010, 02:30 PM
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...

• Replies: 2
• Views: 3,147
04-25-2010, 10:13 PM
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...

• Replies: 7
• Views: 5,385
04-22-2010, 11:26 AM
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....

• Replies: 0
• Views: 1,999
04-20-2010, 12:39 PM
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...

• Replies: 0
• Views: 2,869
04-19-2010, 01:14 PM
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...

• Replies: 2
• Views: 9,677
04-17-2010, 08:26 PM
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...

• Replies: 0
• Views: 2,074
04-16-2010, 08:36 AM
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...

• Replies: 3
• Views: 2,417
04-12-2010, 04:13 PM
32. ### Unstandardized regression coefficients

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

• Replies: 0
• Views: 6,957
04-11-2010, 02:21 AM
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...

• Replies: 1
• Views: 4,656
BGM
04-10-2010, 04:26 AM
34. ### 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.)...

• Replies: 2
• Views: 8,913
04-07-2010, 08:40 AM
35. ### 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...

• Replies: 0
• Views: 2,383
04-06-2010, 03:19 PM
36. ### 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? ...

• Replies: 0
• Views: 3,129
04-05-2010, 09:34 AM
37. ### 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...

• Replies: 1
• Views: 2,963
04-02-2010, 06:10 PM
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...

• Replies: 0
• Views: 4,706
04-02-2010, 02:54 PM
39. ### A good text on generalised linear models?

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

• Replies: 2
• Views: 3,017
03-28-2010, 03:01 PM
40. ### 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...

• Replies: 0
• Views: 4,994
03-26-2010, 02:02 PM
41. ### 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...

• Replies: 0
• Views: 4,757
03-26-2010, 12:38 PM
42. ### 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...

• Replies: 0
• Views: 5,379
03-25-2010, 02:05 PM
43. ### 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...

• Replies: 2
• Views: 30,025
03-25-2010, 10:03 AM
44. ### 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...

• Replies: 0
• Views: 7,394
03-20-2010, 12:01 PM
45. ### 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...

• Replies: 1
• Views: 5,595
03-16-2010, 08:50 PM
46. ### 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...

• Replies: 1
• Views: 2,481
03-16-2010, 05:23 AM
47. ### 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...

• Replies: 1
• Views: 3,014
03-12-2010, 08:15 PM
48. ### 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...

• Replies: 0
• Views: 2,869
03-11-2010, 09:12 PM
49. ### 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...

• Replies: 3
• Views: 4,598
03-11-2010, 08:57 AM
50. ### 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...

• Replies: 0
• Views: 5,931
03-08-2010, 03:52 AM
51. ### 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...

• Replies: 2
• Views: 10,409
02-24-2010, 07:24 AM
52. ### 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...

• Replies: 1
• Views: 6,433
02-23-2010, 10:03 PM
53. ### 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...

• Replies: 1
• Views: 4,094
02-22-2010, 01:47 AM
54. ### 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...

• Replies: 2
• Views: 2,281
02-20-2010, 10:14 PM
55. ### 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...

• Replies: 6
• Views: 3,680
02-19-2010, 04:13 AM
56. ### 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...

• Replies: 0
• Views: 2,645
02-18-2010, 12:45 PM
57. ### Multiple Linear Regression: How to Calculate the Coefficient

This post has been deleted.

• Replies: 3
• Views: 16,154
02-08-2010, 12:03 PM
58. ### 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...

• Replies: 1
• Views: 3,811
02-02-2010, 10:35 PM

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