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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Post Linear regression: Prais-winsten method in SPSS with confidence intervals

    Hello Any help greatly appreciated.... I've conducted a linear regression but as the data is autocorrelated (Durbin Watson = 0.5) I wanted to...

    Started by alexisg‎, 09-06-2015 07:07 AM
    prais-winsten, regression, spss 22
    • Replies: 0
    • Views: 2,184
    09-06-2015, 07:07 AM Go to last post
  2. Derivation of an equation of Influential Analysis in OLS

    Hi to everyone, I'm new to this forum and I'm very pleased for the existence of this forum, since the fact that forums in these times are in decay....

    Started by alexjmackh_94‎, 04-16-2017 07:05 PM
    econometrics, influential outliers, ols
    • Replies: 2
    • Views: 570
    04-17-2017, 10:32 PM Go to last post
  3. Regression for qualitative ind. vars and a quantitative dep. var

    I need to perform a regression analysis where the dependent variable is quantitative and there are numerous qualitative independent variables. These...

    Started by alexsayde‎, 07-03-2012 06:23 PM
    • Replies: 0
    • Views: 1,327
    07-03-2012, 06:23 PM Go to last post
  4. The Connection between conditional expectation and unconditional expectation

    William Greene, Econometric Analysis, 7th edition, 20th page: The zero conditional mean implies that the unconditional mean is also zero, since E...

    Started by alexyflemming‎, 09-28-2011 06:51 AM
    • Replies: 3
    • Views: 12,487
    10-02-2011, 02:18 PM Go to last post
  5. R^2 vs AIC paradox?

    Hi Everyone, I have the following situation which has me a bit puzzled. I've fitted two different linear models to a data set and would like to...

    Started by alfredman‎, 03-28-2011 07:07 AM
    • Replies: 13
    • Views: 16,187
    04-07-2011, 11:10 PM Go to last post
  6. standardized residuals

    hi is it possible to do (standardized residuals) in SPSS for detecting outliers more than one time.

    Started by Ali Ali‎, 10-03-2013 12:01 AM
    • Replies: 3
    • Views: 1,936
    10-03-2013, 10:33 AM Go to last post
  7. Business Stats, regression

    Hey everyone, Does anyone know the steps that minitab or any other stats software does to eliminate variables when doing forward selection,...

    Started by alias‎, 04-01-2011 05:37 PM
    • Replies: 0
    • Views: 3,310
    04-01-2011, 05:37 PM Go to last post
  8. Urgent help, please...thanks . A.S.A.P

    Thanks admin for your ongoing feedback... I am facing this problem with the Leckert Scale...follows: data set to be collected - 5 points:...

    Started by alicccccc‎, 11-12-2008 10:01 PM
    • Replies: 3
    • Views: 2,842
    04-18-2009, 07:21 PM Go to last post
  9. Dummy variable regression with a few observations

    Dear all, I have 26 observations about Italian cities. I would like to control for regional fixed effects by adding a dummy variable for each...

    Started by alice88‎, 11-09-2013 12:22 PM
    dummy, fixed effects
    • Replies: 0
    • Views: 1,246
    11-09-2013, 12:22 PM Go to last post
  10. Non-linearity violation (predictor and log odds) in logistic regression with SAS

    Hi, I'm new to modelling and logistic regression, so I need a bit of help. I'm building a logistic regression model, and one of my continuous...

    Started by AliceMiles‎, 03-04-2017 11:38 PM
    • Replies: 2
    • Views: 1,178
    03-05-2017, 01:32 PM Go to last post
  11. Smile Conditional logistic regression- effect of modifiers

    Hi everybody, I am new here in this forum. I am studying the effect of air pollution (PM) on health outcomes, and the characteristics that might...

    Started by AlinaVo‎, 02-18-2015 03:18 AM
    case control; matched, coefficients, conditional regression
    • Replies: 0
    • Views: 1,595
    02-18-2015, 03:18 AM Go to last post
  12. binary logistics for suicide ideation and attempt

    Hi, I am doing analysis for relatively large sample of high school students (4000) of predicting lifetime usage of psychoactive substances as...

    Started by aliriza.arenliu‎, 09-10-2012 07:48 AM
    • Replies: 6
    • Views: 1,862
    09-12-2012, 05:38 PM Go to last post
  13. Getting values larger than 1 for a logit test?

    I have run a logit test on a binary dependent variable "gambled?" against "Age" in STATA. I have the dependent variable coded as 0 for no and 1 for...

    Started by AliT128‎, 04-08-2014 12:20 PM
    binary, interpret, logit, stata, variable
    • Replies: 4
    • Views: 1,353
    04-08-2014, 02:02 PM Go to last post
  14. Mediation with Regression Analysis Need Help some basic Question (Using SPSS)

    I have 3 variables (2 are independent and 1 is dependent). All three variables are measured with questionnaires consisting of multiple questions...

    Started by alizubair‎, 05-01-2014 12:42 AM
    mediation, regression, response
    • Replies: 0
    • Views: 912
    05-01-2014, 12:42 AM Go to last post
  15. Beginner question

    When I do a regression using monthly returns to get a beta using the CAPM, are the alpha and beta values also monthly? Thanks!

    Started by allan89a‎, 11-22-2011 03:01 PM
    • Replies: 1
    • Views: 1,870
    11-23-2011, 04:06 AM Go to last post
  16. Urgent: Help needed with ordinal data

    Hey all, So far I mostly worked with quantitative data, but now I have to do an analysis on effects alcohol consumption. Now I got a questionnaire...

    Started by allez‎, 05-26-2013 08:41 AM
    • Replies: 1
    • Views: 1,693
    05-29-2013, 09:44 AM Go to last post
  17. Multiple linear regression in cross-country analysis with small sample size

    Hello, While conducting small student’s research project I’ve faced a little problem. I’m using aggregated country data (not in individual, but...

    Started by AloisDusek‎, 10-01-2017 07:10 AM
    • Replies: 0
    • Views: 185
    10-01-2017, 07:10 AM Go to last post
  18. simple logistic regression question

    I'm doing a willingness to pay survey to see if people are willing to spend $1 for clean water. I randomly sampled 100 people and one of the...

    Started by alphaqn69‎, 02-12-2011 05:10 PM
    • Replies: 5
    • Views: 5,045
    02-28-2011, 12:36 AM Go to last post
  19. Smile curvature

    I have a set of data that i would like to find out if it has a curvature. i was told that you can apply ANOV analysis to see if curvature is...

    Started by alshajara‎, 11-16-2012 12:14 PM
    • Replies: 1
    • Views: 1,516
    11-16-2012, 11:57 PM Go to last post
  20. Regression Analysis based on least square method

    Dear colleagues, I need some help with SPSS. I did an experimental study and found that from dimensional analysis that my dependent variable is...

    Started by Altaf Taqi‎, 04-20-2014 07:07 AM
    • Replies: 0
    • Views: 1,579
    04-20-2014, 07:07 AM Go to last post
  21. Transforming non normal data

    Hi, Your help would be highly appreciated I’m trying to develop statistical models to predict soil salinity for three sites from field data which...

    Started by Amal‎, 03-11-2013 11:14 PM
    • Replies: 1
    • Views: 2,424
    03-12-2013, 10:49 AM Go to last post
  22. Is this data acceptable for a multiple regression?

    Hi all, I have data from a community with MIN size (g) MAX size (g) MAX size without neighbours (g), Height (cm) and Area (cm^2). I have this for...

    Started by amandat‎, 04-02-2012 09:56 AM
    • Replies: 3
    • Views: 2,147
    04-02-2012, 01:58 PM Go to last post
  23. Simple regerssion

    I am new to stats and this may be very easy for Seniors. In my regression analysis I want to find, how “% change” is affected by other variables, the...

    Started by amandeepsharma89‎, 06-04-2012 04:23 PM
    regression analysis
    • Replies: 12
    • Views: 2,136
    06-10-2012, 02:17 PM Go to last post
  24. Liner regression interpretation

    Hello Seniors, In my regression analysis I want to find, how “% change” is affected by other variables, the day of the month (Sunday, Monday etc.)...

    Started by amandeepsharma89‎, 06-22-2012 11:24 AM
    • Replies: 0
    • Views: 1,883
    06-22-2012, 11:24 AM Go to last post
  25. Correlation

    Is it possible to correlate two categorical variables? I have a data on building homes in different cities. I want to show correlation on how...

    Started by amanp786‎, 02-08-2014 07:31 PM
    • Replies: 2
    • Views: 1,249
    02-09-2014, 01:39 AM Go to last post
  26. Need help! Fairly simple questions.

    Hey guys, So I successfully proved that the sum of epsilons (the e in y=B0+B1*x+e) equaled 0. Now how do I prove that the sum of xi's...

    Started by amarkham‎, 01-27-2011 09:29 PM
    • Replies: 0
    • Views: 2,293
    01-27-2011, 09:29 PM Go to last post
  27. Interpreting an order logit

    This isn't my homework, but was acctually meant for my blog. I had planned on running the ordered logit models, running predicted probabilities and...

    Started by amathew‎, 09-23-2010 07:33 PM
    • Replies: 0
    • Views: 2,270
    09-23-2010, 07:33 PM Go to last post
  28. Linear Model Prediction

    I'm working on a linear model that looks like: Price = B0 + B1(Gender) + B2(Age) + B3(Credit Type) + B4(Home) ... The predictior is price, and...

    Started by amathew‎, 12-20-2011 05:56 PM
    • Replies: 13
    • Views: 3,296
    12-21-2011, 11:06 AM Go to last post
  29. Question about predicted probabilities from a logit model

    So I have the following data and logistic regression mode = df=data.frame(income=c(5,5,3,3,6,5), won=c(0,0,1,1,1,0), ...

    Started by amathew‎, 08-13-2012 06:16 PM
    • Replies: 3
    • Views: 2,461
    08-14-2012, 01:00 PM Go to last post
  30. Noob question about predictive modeling

    I'm trying to understand some concepts related to predictive modeling. So let's say that I have the following data sample and am trying to regress...

    Started by amathew‎, 09-01-2013 02:56 PM
    • Replies: 2
    • Views: 1,658
    09-04-2013, 03:46 AM Go to last post
  31. Smile twoway ANOVA, post hoc test? New to statistics.

    This is probably easy, but this is new to me, hoping for some help here:tup:

    Started by ama_nil‎, 02-08-2016 05:44 AM
    anova, newbie
    • Replies: 1
    • Views: 1,460
    02-08-2016, 07:39 PM Go to last post
  32. anova repeated measures with interaction term

    i hva been sitting here for 6 hours trying to figure out what i am doing wrong, but i cant figure it out. I am doing anova with repeated measures....

    Started by ama_nil‎, 02-12-2016 07:57 AM
    • Replies: 0
    • Views: 1,065
    02-12-2016, 07:57 AM Go to last post
  33. Latent Growth Model in AMOS: Positive path coefficients but a negative avg slope?

    Hi Everyone - I have a latent growth model with the intercept and slope predicting 7 equally-spaced measurements of a continuous variable. The model...

    Started by amberemily12‎, 03-07-2014 02:21 PM
    amos, latent growth models
    • Replies: 0
    • Views: 1,437
    03-07-2014, 02:21 PM Go to last post
  34. Validation for prognostic marker

    Dear All, I am completely lost in the area of statistics. I have a dataset of 265 cancer patients with a novel protein marker as well as the known...

    Started by ambinlab‎, 04-03-2015 01:37 AM
    • Replies: 3
    • Views: 2,004
    04-05-2015, 12:24 PM Go to last post
  35. How to do a added variable plot in minitab?

    Hi, I have a data set of measurements for body fat, two of the variables are age and neck circumference. I've been asked to estimate the amount...

    Started by AMcC‎, 11-13-2013 05:05 PM
    added variable plot, fitted line plot, regression
    • Replies: 0
    • Views: 3,119
    11-13-2013, 05:05 PM Go to last post
  36. Linear Models-Given three objects of unknown weight and a set of scales with one pan.

    Hi all, I am new to this and pure desperation is starting to set in. Below is my problem: Three objects with unknown weights are weighed on a...

    Started by AMcC‎, 11-11-2013 02:33 PM
    linear models, ordinary least squares, pan, weight
    • Replies: 1
    • Views: 1,557
    11-14-2013, 02:37 AM Go to last post
  37. Applied linear regression model

    any one can tell me the "real life application of linear model" with example ????

    Started by ameeq7746‎, 12-01-2013 07:59 AM
    • Replies: 0
    • Views: 1,465
    12-01-2013, 07:59 AM Go to last post
  38. Question Need help on deciding the analysis tests

    Hello every one, I am doing research in social science. i have following issue for which I need advise: 1. My sample is a snowball sample and...

    Started by amjadyunus‎, 03-09-2006 03:44 PM
    • Replies: 3
    • Views: 2,913
    03-16-2006, 08:43 AM Go to last post
  39. How to report and interpret non significant single regression? Its urgent plz help

    HI, can anyone please help me interpret this picture? we have not learnt this yet. will be grateful! ...

    Started by Amna_22‎, 04-20-2017 08:35 AM
    • Replies: 1
    • Views: 692
    04-20-2017, 10:10 AM Go to last post
  40. random factor levels with highly varying numbers of data points

    Hi! I am doing a fairly straightforward analysis where we have a dependent variable which we try to measure many times under different conditions...

    Started by amorphia‎, 09-13-2013 02:23 PM
    • Replies: 0
    • Views: 1,369
    09-13-2013, 02:23 PM Go to last post
  41. Question Straightforward question about how to select Generalized Linear Model

    Hi! I have what I think is quite a straightforward problem for those in the know. I have a dependent variable measured in different subjects....

    Started by amorphia78‎, 05-18-2011 03:12 PM
    • Replies: 7
    • Views: 3,055
    05-19-2011, 02:54 PM Go to last post
  42. Multiple regression analysis

    Hello All, Please help me with my multiple regression analysis result. My questionnaire consisted of 7 independent variables using 7 point...

    Started by Amrita‎, 07-21-2016 02:56 AM
    • Replies: 0
    • Views: 769
    07-21-2016, 02:56 AM Go to last post
  43. Non constant variance in residuals?

    Hi, When doing Linear Regression or Generalised Linear Modelling, and the residuals show non constant variance, how do you remove it? For example,...

    Started by amsbam1‎, 03-27-2013 01:28 PM
    • Replies: 3
    • Views: 4,724
    03-28-2013, 08:57 PM Go to last post
  44. Red face Probably a dumb question...

    I have been using R to code my analyses for my research projects, and unfortunately my statistics background is sparse and ancient; please pardon me....

    Started by amyamy‎, 09-18-2011 10:27 PM
    • Replies: 1
    • Views: 2,373
    09-24-2011, 01:00 PM Go to last post
  45. Novice needs help with Maximum Likelihood Estimation of Logit Model

    Hi all, I’d be grateful for some help. I realise this is perhaps elementary stuff for many but as someone without a formal statistics background, I...

    Started by An Novice‎, 09-16-2011 06:25 AM
    • Replies: 3
    • Views: 3,456
    09-16-2011, 09:21 AM Go to last post
  46. Exclamation moderated hierarchical regression

    Hello, I urgently need help. I have to test a hypothesis regarding moderating role. I know the procedure how to do it in SPSS with moderated...

    Started by ana2012‎, 09-03-2012 02:51 PM
    • Replies: 0
    • Views: 3,143
    09-03-2012, 02:51 PM Go to last post
  47. Weighted Least Squares & VIF - SPSS questions

    I was hoping someone could help me understand a problem I am having. I frequently use weighted least squares, however I do not estimate the weights...

    Started by AnalystNYC‎, 04-19-2011 10:17 AM
    • Replies: 0
    • Views: 4,147
    04-19-2011, 10:17 AM Go to last post
  48. What's a logistic regression?

    Hello, in college we learned multiple regression techniques (different models: linear, log-lin, lin-log, exponential, ...) - including all the...

    Started by Analytics‎, 12-24-2007 05:34 PM
    • Replies: 4
    • Views: 5,749
    12-30-2007, 05:45 PM Go to last post
  49. statistical analysis of global warming/fossil fuels

    Hello, I have to write a paper for a class (environmental management). I've been thinking quite a bit about global warming/weather trends and how...

    Started by Analytics‎, 01-11-2008 08:14 PM
    • Replies: 0
    • Views: 4,148
    01-11-2008, 08:14 PM Go to last post
  50. what I dont get about statistical techniques!

    I bought and read a book about multiple regression analysis (least squares) and it contains tests for each assumptions and not just linear models,...

    Started by Analytics‎, 01-11-2008 10:34 PM
    • Replies: 0
    • Views: 2,560
    01-11-2008, 10:34 PM Go to last post
  51. learning logistic regression

    If you're really good at multiple linear/non-linear regression analysis, would it be hard to learn how to do a logistic regression? Is that a lot...

    Started by Analytics‎, 01-20-2008 10:50 PM
    • Replies: 1
    • Views: 2,345
    01-21-2008, 03:12 AM Go to last post
  52. LinearRegressionQuestions

    Hello, Can someone please help with Question 1.3 onwards in the attached file. Thanks, AJ

    Started by analyticsjane‎, 12-10-2016 07:50 AM
    • Replies: 0
    • Views: 2,224
    12-10-2016, 07:50 AM Go to last post
  53. Help with dummy variable

    Hi, I have a set of OLS-fixed effects models comprising continuous and dummy variables, with the latter used as control parameters. My models aim...

    Started by anant.nanocorp‎, 05-26-2013 09:24 AM
    dummy variables, fixed effects, regression, stata
    • Replies: 1
    • Views: 2,202
    05-27-2013, 09:25 PM Go to last post
  54. Exclamation Is the difference significant.

    I'm using stata since only a few weeks for my thesis. I can use some help regarding the following: I wanted to know what the mean grade is for...

    Started by Anbrhave‎, 10-28-2010 10:04 AM
    • Replies: 0
    • Views: 4,961
    10-28-2010, 10:04 AM Go to last post
  55. Question Instruments

    I have a question concerning endogenous variables. I want to do the following OLS regression: Grade Point Average=constant + φ1 work hours + φ2...

    Started by Anbrhave‎, 11-03-2010 05:56 AM
    • Replies: 1
    • Views: 2,150
    11-08-2010, 12:40 PM Go to last post
  56. Exclamation Instrumental variable analysis

    Dear people, In my simple regression analysis are two variables endogenous. GPAi = α + β•Wi +β•Wi^2 + θ•Si + θ•Si^2 + Qi•φ + εi Where Wi and Si...

    Started by Anbrhave‎, 11-23-2010 07:55 AM
    • Replies: 0
    • Views: 4,792
    11-23-2010, 07:55 AM Go to last post
  57. Co-efficient interpretation in Gamma Regression Model

    Hi Guys, I am trying to fit a gamma regression model using a log link model. Now, I get a negative co-efficient for one of my IVs. What is the...

    Started by Ancalagon The Black‎, 07-06-2011 01:49 PM
    gamma regression, glm, regression
    • Replies: 0
    • Views: 3,497
    07-06-2011, 01:49 PM Go to last post
  58. Comparing importance of predictors - unstandardized or standardized beta?

    Hi, can someone explain me should I compare importance of two predictors by their unstandardized or standardized beta? If both are significant, I...

    Started by Anchyboom‎, 05-06-2013 12:43 PM
    • Replies: 3
    • Views: 3,128
    05-06-2013, 03:49 PM Go to last post
  59. Matching

    Dear experts, For a fMRI (functional brain scan) experiment, I am comparing scans from 40 subjects with a condition that may or may not affect the...

    Started by andhou‎, 01-27-2014 06:54 AM
    • Replies: 0
    • Views: 1,544
    01-27-2014, 06:54 AM Go to last post
  60. correct regression model for dependent variable

    Hi all, I am new to this forum and I hope that the qestions that are bothering me can be answered together with your help. I have data (N=220)...

    Started by andik‎, 01-19-2015 09:33 PM
    • Replies: 11
    • Views: 2,362
    02-12-2015, 08:47 AM Go to last post

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