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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Conditional regression

Hi all, I am trying to run explanatory regression: Y = alpha + Beta1*X*I{X.*Y>0}+Beta2*X*I{X.*Y<=0} where I{} is indicator function Since...

• Replies: 2
• Views: 2,194
03-24-2012, 05:49 PM
2. ### Conditional Regression Analysis in SPSS

Hi all, I’m trying to do a matched paired analysis on some data. I have two groups of children, matched by age and sex. Each pair has been given a...

• Replies: 1
• Views: 4,200
02-23-2014, 04:09 PM
3. ### Conducting a White's test in SPSS

PLEASE anyone?? I'm really struggling here... Hi everyone, I've seen a tutorial on youtube on how to conduct a white's test in spss. I was...

• Replies: 1
• Views: 6,083
07-10-2015, 05:44 AM
4. ### confidence and prediction interval

Let's say I have the following data: y: 19.695 77.310 138.938 16.382 36.249 111.078 9.497 61.270 42.804 52.931 x: 4.0860 8.6203 11.6592 3.6581...

• Replies: 1
• Views: 9,740
10-20-2005, 08:13 AM
5. ### confidence band from se in quadratic regression

Hi, I have the following problem: I want to draw confidence band for a quadratic regression I have the model: y=a+b*x+c*x^2, i have...

• Replies: 0
• Views: 1,479
11-25-2011, 07:29 AM
6. ### Confidence for pooled within group slope

In SPSS simple linear regression one can get the confidence limits either side of the linear regression slope simply by ticking the "prediction...

• Replies: 2
• Views: 1,158
03-28-2015, 03:18 AM
7. ### confidence interval

how do you find confidence interval ?

• Replies: 3
• Views: 796
04-20-2017, 07:49 PM
8. ### confidence interval and p value

dialysis Odds Ratio Std. Err. z P>z logintercept .0001105 .0003682 -2.73 0.006 1.61e-07 .0756841 Dear , I am have...

• Replies: 2
• Views: 2,040
02-23-2017, 08:30 PM
9. ### Confidence interval for coefficient of regression

Hi, I dont understand how we can find the CI when we dont know what is n ? My question says. c) Assume that Se^2 =12.84 and V(β)= Se^2/(sumX^1)...

• Replies: 2
• Views: 2,906
04-30-2011, 02:32 PM
10. ### Confidence Interval for Prediction in Weighted Regression

Hi everyone, I'm currently writing my final year project in analytical chemistry, and have got to the stage of calculating confidence intervals...

• Replies: 0
• Views: 5,717
03-22-2009, 12:39 PM
11. ### Confidence interval of a delta-Rsquare

Hello all, ¿Does someone know if there is any way to obtain the confidence interval (or the SE) of a delta-Rsquare when fitting a latent variable...

• Replies: 0
• Views: 1,248
12-20-2013, 06:06 AM
12. ### Confidence Interval With Regressed Logarithms

I have converted 80 ("Count") pairs of X and Y to L10(X) and L10(Y) and performed a regression analysis. Assuming a valid correlation, I know I can...

• Replies: 0
• Views: 1,166
12-12-2013, 05:27 PM
13. ### confidence interval/f-tests

Basically Fe (iron) is the x variable/predictor, and MDD loss is the y variable/response in minitab. 1. I generated some data (regressoin...

• Replies: 1
• Views: 6,348
02-23-2011, 01:01 PM
14. ### Confidence intervals comparison for linear and quadratic slopes?

Hello, I am using regression analyses to evaluate changes in several different cognitive functions across the life span. In most cases, the...

• Replies: 0
• Views: 888
06-08-2016, 09:09 PM
15. ### Confidence Intervals for Estimates in Multinomial Logistic Regression

Hello all, Is there a way to calculate a confidence interval for the estimates occurances of a dependent variable when using multinomial logistic...

• Replies: 8
• Views: 8,865
06-05-2011, 03:51 PM
16. ### confidence intervals for linear regression

Hi, newbie here, so please forgive the bad terminology. I started with ten years of historical data. I used Excel to give me a linear trendline and...

• Replies: 3
• Views: 3,597
01-11-2012, 09:13 PM
17. ### confidence intervals in logistic regression with clusters

Hi, this is probably a simple question but i hoped someone could explain it to me, I have carried out a logistic regression model assesing the...

• Replies: 0
• Views: 1,033
01-10-2012, 06:06 AM
18. ### Confidence limits for logistic regression equation

I have generated a logistic model for a disease status Y (unaffected-affected) using several independent variables on a very large (600K+) dataset. I...

• Replies: 0
• Views: 3,183
03-21-2013, 11:29 PM
19. ### Confident intervals not so confident at all... what went wrong?

I'm doing a linear regression analysis with 3 predictors and 76 cases. So far, everything is going smooth. R^2 = 0.95. So, I let SPSS calculate...

• Replies: 3
• Views: 2,467
02-22-2013, 04:48 PM
20. ### Confounder

What if I see a 10% change (decrease) in an variable effect (X1 on Y) when including another variable (X2), though the effect of X1 is never remotely...

• Replies: 3
• Views: 1,494
08-16-2015, 11:16 AM
21. ### Confounder confounds at only one level of polytomous variable

Hello! I have looked for a post on this but have been unsuccessful. It would be great if you could help. I am using logistic regression in SAS. ...

• Replies: 0
• Views: 933
rkw
04-16-2016, 06:35 PM
22. ### Confused about how to proceed

Hi all, I have Y vectors = (0, 5, 10, 15, 20) At Condition1, x Vectors = (-0.0056, 5.0000, 10.0057, 15.0057, 20.0000) At Condition2, x vectors =...

• Replies: 1
• Views: 984
09-30-2015, 02:51 AM
23. ### Confused about my Logistic Regression output (SPSS)

Hi Guys, I've conducted a binary logistic regression using 2 categorical predictors (Static-moving and moving-static) and an outcome variable...

• Replies: 4
• Views: 1,226
04-06-2016, 04:44 AM
24. ### Confused: Mixed model, step-wise regression, testing for random effects

Dear all, I want to perform a MLR (mixed model) on a data set (details below) that has both numeric and categorical explanatory variables. The...

• Replies: 0
• Views: 1,259
08-30-2014, 04:53 AM
25. ### Confusing results after introduction of an interaction effect

Found answers to my question. You can delete this topic.

• Replies: 0
• Views: 1,177
10-06-2013, 11:24 PM
26. ### Confusing statement on heteroscedasticity 1986 paper

From Sefcik & Thompson's (1986) "An approach to statistical inference in Cross-Sectional Models with Security Abnormal Returns as Dependent...

• Replies: 2
• Views: 1,324
08-05-2012, 06:57 AM
27. ### confusion about Ho/Ha hypothesis for simple/multiple regression

The one thing I do not understand (and my book doesn't explain) is how do you determine if it's Ha > 0, Ha < 0 or Ha =/= 0? Anyone can shed some...

• Replies: 2
• Views: 9,333
12-08-2009, 08:14 PM
28. ### Confusion over how to calculate regression coefficient

I'm trying to find the regression coefficient of one set of a data on another. There is a linear relationship between the two sets of data. After a...

• Replies: 6
• Views: 11,276
06-22-2011, 01:33 PM
29. ### Confusion over the F-ratio in a hierarchical multiple regression

Hey all, I'm not used to work with multiple regression analysis, so I would be glad if anyone could help me interpreting this result: I...

• Replies: 1
• Views: 7,637
08-26-2013, 09:33 AM
30. ### Consequences of wrongly applying dummy variables?

I was just wondering if there were any consequences to applying dummy variables to independent variables which don't need it. For example, let's...

• Replies: 0
• Views: 1,202
08-10-2014, 06:58 AM
31. ### Consistency of an estimator for nonlinear regression

Dear all, It is stated e.g. in that to prove consistency of an estimator \hat{\theta}_n it is sufficient to prove that the true value ...

• Replies: 1
• Views: 1,609
05-21-2012, 07:44 AM
32. ### Consolidation of items for regression analysis

Hello everyone! I am a stats newbie and have a very basic question. Please forgive me if the question may seem too foolish. I wanted to conduct...

• Replies: 1
• Views: 1,349
06-16-2016, 09:12 PM
33. ### Constant Elasticity Model

I was wondering if anyone could please try to help me understand where I'm going wrong with the following logic: I have been trying to look at a...

• Replies: 1
• Views: 7,353
10-23-2012, 09:31 AM
34. ### Constant in linear regression

Hey guys, Need help in Linear regression: I have a dataset of 70 tumors that during resection we used an electric measurement to estimate a...

• Replies: 0
• Views: 1,897
06-05-2016, 10:47 PM
35. ### Constant negative fitted values...am I missing something?

Hello all, I'm attempting to fit a model where y variable is a variety of \$/ha/year figures (all positive) ranging between 0.01 and 2520. The...

• Replies: 2
• Views: 1,370
08-05-2014, 04:34 AM
36. ### Constant of 1: Why?

I know that in regression (well any linear model I would assume; correct this if I'm wrong) models there's a constant of 1 added to the model. I've...

• Replies: 7
• Views: 3,033
09-19-2012, 12:19 PM
37. ### 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: 4,123
02-22-2010, 01:47 AM
38. ### 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...

• Replies: 2
• Views: 17,664
09-13-2010, 12:38 PM
39. ### Constrained OLS with Moore-Pseudoinverse?

Hello, First of all - my first post here and I haven't found a way to enter formulas. So please excuse that I linked the wiki article instead. The...

• Replies: 0
• Views: 1,760
05-15-2014, 02:38 AM
40. ### Constructing Prediction Intervals for Forecasted Values in a Time Series

I have a time series with 231 data points and the following descriptive statistics: Mean 75,231.66 Standard Error 969.98 Median 70,728.00 ...

• Replies: 3
• Views: 5,626
09-18-2013, 09:14 AM
41. ### consulting help needed (will pay)

In about a month, I will be in need of help on some statistical analyses in the following areas: -categorical data analysis -multiple linear...

• Replies: 1
• Views: 2,649
08-12-2008, 02:41 PM
42. ### Continuous by contiuous interaction and non-linearity in OLS

To whom it may concern: I am conducting an OLS for a class assignment and have an interaction between ADHD and non-delinquent peers. I have...

• Replies: 7
• Views: 1,747
05-02-2014, 01:44 PM
43. ### continuous dep variable with several indip dicotomic variables: which statistic?

Hello there! I have to analyze these results: my dependent variable is continuous (blood levels of a substance) I have several indipendent...

• Replies: 5
• Views: 2,514
09-04-2013, 08:30 AM
44. ### Continuous Moderator and DV and categorical IV (dummy coded) Help please!!!

I ran an experiment recently and now I'm trying to work out whether either of the covariates (anxiety or avoidance) interact with the effect of any...

• Replies: 1
• Views: 4,303
06-11-2012, 03:28 PM
45. ### Contribution of known values to a regression model

Hello, Can anyone please tell me how I work out the contribution of known values make to a regression model using spss. For example I have a...

• Replies: 1
• Views: 2,418
04-19-2013, 02:42 PM
46. ### control for confounding variables using logistic regression

Hello... I'm in a project to investigate the prevalence of intrusive thoughts in patients diagnosed with major depressive disorder and non-clinical...

• Replies: 6
• Views: 1,870
09-08-2015, 03:39 PM
47. ### Control Vairiables in Multiple regression

Hi, I hope someone can help me. I need to run multiple regression with 2 IVs and 1 DV and include a control variables. The control variable is...

• Replies: 12
• Views: 2,487
06-10-2013, 08:34 AM
48. ### Control variable correlated with binary treatment variable

This question regards a social program evaluation which involves participants receiving a binary treatment that they self-select into. Some of these...

• Replies: 0
• Views: 2,015
12-24-2011, 12:16 AM
49. ### Control variable for panel analysis

i am writing a paper analyzing What is the effect of corruption on Government expenditure (education,health,military and infrastructure). I have data...

• Replies: 0
• Views: 1,059
12-16-2015, 06:55 AM
50. ### Control variables, what to do in practise

I understand the theoretical use of control variables in regression analysis but when it comes to actually using them in practise i am stumped. Do...

• Replies: 1
• Views: 1,405
12-17-2012, 05:31 PM
51. ### Controling variable in regression analysis for the moderators

Hi I am doing hierarchical regression to test the moderators effect between IV (violation perception) and DV1 (emotion) and DV2(behaviour). ...

• Replies: 0
• Views: 1,462
06-28-2013, 01:11 PM
52. ### Controlling for a variable in multiple regression creates significance of another var

I have continuous variables A, B and C. A/B correlates with C significantly. Neither A, B or A*B correlates significantly with C. In multiple...

• Replies: 1
• Views: 882
10-12-2016, 08:12 AM
53. ### Controlling for age in multiple regression?

Please bear with me, I'm hopeless at statistics and so very lost right now. I'm wanting to run a multiple regression with 9 IVs and 1 DV. I want...

• Replies: 1
• Views: 2,228
07-27-2012, 12:32 PM
54. ### Controlling for group differences of no interest - regression, ANCOVA, neiter?

Have been hunting around for a while and thought I ask here: Using SPSS, I have a continuous interval DV (test performace) and one four-level...

• Replies: 1
• Views: 1,785
02-11-2013, 04:09 PM

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