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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Relationship between Pearson correlation and variance in regression model

    If the correlation between X and Y, say, is 0.5, then the standard deviation of the differences between the Y values and their predicted values on...

    Started by _joey‎, 08-12-2012 08:50 PM
    • Replies: 14
    • Views: 8,073
    08-12-2012, 11:33 PM Go to last post
  2. Interpreting Interaction Terms

    I am working on a regression analysis problem where we have to see if there is an interaction between two of the independent (X) variables. I run...

    Started by _IT_Not_Stats_‎, 11-29-2011 04:00 PM
    • Replies: 3
    • Views: 1,967
    11-30-2011, 12:26 PM Go to last post
  3. Observing relationships through regression.

    Hi all - I hope this is in the right sub-forum... I have a question regarding regression and working out the relationship between two variables....

    Started by _Alex_‎, 11-29-2011 12:24 PM
    • Replies: 8
    • Views: 2,813
    11-30-2011, 04:37 PM Go to last post
  4. General Linear Model issues.

    Again, I hope this is in the correct sub-forum. Having had some very useful advice for my first issue, I thought I might post my second problem, this...

    Started by _Alex_‎, 11-30-2011 05:29 PM
    • Replies: 2
    • Views: 5,834
    12-01-2011, 07:32 PM Go to last post
  5. transform y to log(y)

    Hi, I'm wondering what kind of data is appropriate for transforming the response y into log(y)? ( So the model becomes log(y)= a^x1 +...

    Started by zzzc‎, 10-22-2010 08:12 PM
    • Replies: 10
    • Views: 7,290
    11-08-2010, 01:43 PM Go to last post
  6. stating the model (logistic) in my report

    Hi, Sorry this might seem like silly question. But I'm wondering whats the conventional way of stating the logistic binary model when writing up...

    Started by zzzc‎, 10-29-2010 01:14 PM
    • Replies: 1
    • Views: 2,002
    10-30-2010, 08:56 AM Go to last post
  7. Simulated response

    Hi, I have a bunch of simulated predictors and the assumed coefficients that I'm going to use. Now I need to simulate the response Y = b0 +...

    Started by zzzc‎, 10-29-2010 05:44 PM
    • Replies: 1
    • Views: 3,068
    10-29-2010, 06:49 PM Go to last post
  8. Question Factor scores as independent variables in multiple regression

    I'm checking that I have understood this right. Factor scores must be achieved via oblique rotation, because factor scores must be allowed to...

    Started by zxc‎, 04-19-2016 11:25 AM
    • Replies: 0
    • Views: 810
    04-19-2016, 11:25 AM Go to last post
  9. Need help on ( unadjusted and adjusted w / 95% cl) odds ratio

    I am doing Logistic regression on spss. My dependent variable is test result (+ or -) independent variables are Age and Gender (M,F). How can i get...

    Started by zqkal‎, 01-30-2012 01:24 PM
    • Replies: 1
    • Views: 6,634
    01-30-2012, 01:26 PM Go to last post
  10. Combining various prediction equations.

    Hello all, I have been looking for a method to combine various linear prediction equations. These equations predict the same quantity but...

    Started by zoulzubazz‎, 06-21-2013 01:01 PM
    • Replies: 5
    • Views: 1,582
    07-05-2013, 12:55 PM Go to last post
  11. out of sample

    Hi There I have 2500 data with 2 sample. one index and another stock. i've done goodness of fit and regression analysis on it.now I've been asked to...

    Started by Zore‎, 05-25-2016 08:36 PM
    • Replies: 3
    • Views: 1,057
    05-30-2016, 07:05 AM Go to last post
  12. Greatest impact prediction

    Hi, please i have one Question. If i have this results (Stepwise method) Can i say: 1) Better for predict Y is model 4 2) Regression...

    Started by zonicek‎, 03-29-2012 04:52 PM
    • Replies: 1
    • Views: 1,338
    03-31-2012, 12:39 AM Go to last post
  13. Logisitic regression with ranked independent variables

    Hi all, This is my first post, so be gentle. I have the following type of data: ----------------------------- Data Set-1 DV......

    Started by zompano‎, 06-12-2012 04:36 PM
    • Replies: 0
    • Views: 2,403
    06-12-2012, 04:36 PM Go to last post
  14. Statistics Regression Question

    I need help with this question! The graph is in the picture below! A popular, nationwide standardized test taken by high-school juniors and...

    Started by zolton5971‎, 03-05-2015 09:56 AM
    • Replies: 5
    • Views: 2,478
    03-07-2015, 02:40 PM Go to last post
  15. Regression fitted values

    I'm working with a dataset that I'm using to model total biomass (which was a variable created by adding three components of biomass). I also modeled...

    Started by zlj.pr‎, 05-05-2013 05:20 PM
    • Replies: 3
    • Views: 2,664
    05-07-2013, 07:12 PM Go to last post
  16. Question Using Odd values for variable selection in logistic regression

    Hello, I have a question about independent variables selection when a logistic regression is used as classification method. Is it an acceptable or...

    Started by Ziyad‎, 09-22-2010 12:05 PM
    • Replies: 0
    • Views: 2,678
    09-22-2010, 12:05 PM Go to last post
  17. Correcting lack of fit

    I have a very simple data set with a single regressor that has all negative values. The data set provides no context, only values. When testing...

    Started by zicke01‎, 10-20-2012 03:18 PM
    • Replies: 4
    • Views: 2,041
    10-21-2012, 02:01 PM Go to last post
  18. The DV is binary, and two IVs are times series data, how to do regression?

    Hi guys, please help!!!! I want to do regression on a data having such fields: Loan_number Date default_nextmonth Unemployment_rate ...

    Started by Zhenni Li‎, 07-28-2011 12:42 PM
    • Replies: 1
    • Views: 2,059
    07-29-2011, 09:34 PM Go to last post
  19. Is it best to match data units to get a logical regressional relationship?

    Hi, I'm trying to find an economic relationship between inflation(CPI) and leakages to the economy like Taxes, Savings, and Imports. Well, it...

    Started by Zenny‎, 04-10-2017 09:22 PM
    • Replies: 6
    • Views: 707
    04-11-2017, 02:20 PM Go to last post
  20. Please help

    Hi everyone I am wondering if you can help me out. I am completing my PhD and have run into some problems interpreting some of the stats. I have...

    Started by Zen‎, 02-25-2014 03:28 PM
    • Replies: 7
    • Views: 1,594
    03-04-2014, 01:50 PM Go to last post
  21. Ordinal Logistic vs. Multinomial Regression and program

    I am trying to conceptually understand when I would use ordinal logistic vs. multinomial. It seems to me that if there is an order to the categories...

    Started by zeloc‎, 12-07-2011 01:56 PM
    • Replies: 2
    • Views: 2,827
    12-07-2011, 08:04 PM Go to last post
  22. Regression when outcome is a rank?

    Is there a particular kind of regression if the outcome is a ranking? I'm wondering if my best bet would be to use the central limit theorem and use...

    Started by zeloc‎, 12-07-2011 08:06 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 20,061
    12-14-2011, 02:36 PM Go to last post
  23. Assumptions of Quantile Regression

    Is equal variance an assumption of quantile regression? Does quantile or median regression have any assumptions? Thanks.

    Started by zeloc‎, 12-11-2011 02:23 PM
    • Replies: 1
    • Views: 3,256
    12-12-2011, 02:07 AM Go to last post
  24. Stationarity and White noise

    Hi all, I'm just beginning to learn about time series analysis for my final year project at uni and I am confused about stationarity. A time series...

    Started by zeke512‎, 10-02-2017 10:57 AM
    • Replies: 4
    • Views: 218
    10-03-2017, 04:53 AM Go to last post
  25. Ordinal Logisitc Regression with Soccer

    Hi I have made up some statistical results and would like to analyse them. 2 teams playing against eachother: Team A and Team B There are 3...

    Started by zebbie‎, 07-11-2013 08:36 PM
    • Replies: 6
    • Views: 4,357
    07-15-2013, 10:26 PM Go to last post
  26. Multivariate responses

    Hey guys, Needed some help on this. Say there is a question what would you spend on : 1) Car 2) House 3) Wedding 4) *** 5) ***

    Started by zayfran31189‎, 08-31-2016 07:48 AM
    • Replies: 1
    • Views: 1,032
    08-31-2016, 10:17 PM Go to last post
  27. Need some ideas

    I need to present something, anything and if anyone has any idea what I can do with this data and how I can pitch it, it would be appreciated. ...

    Started by zayfran31189‎, 09-02-2016 03:47 AM
    • Replies: 1
    • Views: 663
    09-02-2016, 04:39 PM Go to last post
  28. 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
  29. Odds Ratio Interpretation in Logistic Regression when input is Log-Transformed

    Hello, Lets us have a binary dependent variable with 1 as the event and 0 as the non-event. We model the probability of event. The independent...

    Started by zarasandreas‎, 10-21-2012 08:59 AM
    logistic regression, normality
    • Replies: 0
    • Views: 3,692
    10-21-2012, 08:59 AM Go to last post
  30. Additive - Multiplicative and Non Linear Regression

    Hello, Let us say that we have a dependent binary variable expressing the occurence and non occurence of an event. We also have a number of...

    Started by zarasandreas‎, 10-21-2012 12:20 PM
    • Replies: 0
    • Views: 2,447
    10-21-2012, 12:20 PM Go to last post
  31. Interpretation of odds ratio in logistic regression for a logged variable

    Hello, How do we interpret the odds ratio in logistic regression for a logged variable? Thanks in advance.

    Started by zarasandreas‎, 02-05-2013 06:58 AM
    • Replies: 6
    • Views: 3,123
    02-08-2013, 08:43 AM Go to last post
  32. Why do you divide by n-1 to find sample variance? Linear regression

    Okay I have very limited knowledge on statistics but I'm wondering why the hell you divide the numerator in the sample variance formula by n-1. I've...

    Started by zakqux93‎, 08-28-2016 03:07 PM
    • Replies: 2
    • Views: 2,537
    08-28-2016, 03:31 PM Go to last post
  33. How to do a linear multiple regression with multiple correlating independent vars?

    Right I am a total newb at stats but I'll try an explain what I'm trying to do. Im trying to find whether China's Foreign Direct Investment...

    Started by zakqux93‎, 04-26-2017 06:10 AM
    • Replies: 0
    • Views: 501
    04-26-2017, 06:10 AM Go to last post
  34. How to Interpret the Factor Analysis Findings

    Kindly help in interpreting the SPSS Factor Analysis findings as attached

    Started by Zainab‎, 07-23-2016 03:44 PM
    • Replies: 4
    • Views: 2,261
    07-24-2016, 12:37 PM Go to last post
  35. Moved: How to Interpret the Factor Analysis Findings

    Kindly help writing research findings for the Factor Analysis as attached

    Started by Zainab‎, 07-24-2016 06:17 PM
    • Replies: -
    • Views: -
    07-24-2016, 12:37 PM Go to last post
  36. AMOS OUTPUT - Interpreting results for moderation

    Hello! Please some one help me interpret and put in writing the results (attached as images) from AMOS for moderation analysis. Please I need...

    Started by Zainab‎, 08-20-2016 02:47 AM
    • Replies: 1
    • Views: 2,063
    08-22-2016, 06:52 PM Go to last post
  37. How to interpret the Line Graph

    Hello! Please if someone help in writing what this line graph means. Thank You.

    Started by Zainab‎, 08-20-2016 01:32 PM
    • Replies: 2
    • Views: 1,873
    08-20-2016, 04:52 PM Go to last post
  38. Regression Coefficients & Chi Squared test

    I am finding it difficult to understand something I found in a textbook. The author runs a regression of the specification Y = a + bX, on the basis...

    Started by zahg‎, 05-01-2012 01:21 AM
    • Replies: 0
    • Views: 1,580
    05-01-2012, 01:21 AM Go to last post
  39. Interpreting Marginal Effect - Probit

    I am using a probit model, where one of the variables is log(income). I calculated the (average) marginal effect and it resulted in 0.03. I am a...

    Started by zahg‎, 03-15-2013 05:37 AM
    • Replies: 1
    • Views: 3,121
    03-15-2013, 08:08 AM Go to last post
  40. Linear Probability Model

    Hi guys, Just wanted to check because the text books I am using are do not explicitly state it... It does not make sense to rely on the t-stats...

    Started by zahg‎, 03-07-2013 02:03 PM
    • Replies: 0
    • Views: 2,645
    03-07-2013, 02:03 PM Go to last post
  41. Need Urgent help in Kruskal's relative importance

    Hi, My client wanted us to perform Kruskal's relative importance technique on some of their modeling work. We have reviewed lot of literature and...

    Started by zabbs‎, 05-27-2011 01:24 PM
    • Replies: 2
    • Views: 6,623
    10-04-2011, 11:01 AM Go to last post
  42. cox regression and change

    I'm no statistician, but a porgrammeur. I have some statistics during my study, but is not really one of my stektste points. 'm Trying to calculate...

    Started by Zaatlob‎, 09-24-2010 09:27 AM
    • Replies: 0
    • Views: 2,184
    09-24-2010, 09:27 AM Go to last post
  43. Interaction Terms in Linear regression

    In R I used the linear regression call for three variables: y, x, and c Y and X are numeric where C is a dichotomous {0,1}. X and C are the...

    Started by Z-Statistic‎, 10-12-2016 05:49 PM
    • Replies: 1
    • Views: 1,226
    10-12-2016, 08:48 PM Go to last post
  44. SEM - general applicability of analysis, variable aggregation, and data sufficiency

    Dear all, I just discovered this amazing forum and was wondering whether some of you may have answers for some questions I could not find any...

    Started by Yym‎, 08-05-2013 01:07 PM
    circular relationships, data sufficiency, general applicability, measurement model, structural equation model
    • Replies: 0
    • Views: 1,565
    08-05-2013, 01:07 PM Go to last post
  45. Understanding regression analysis

    Hello, we are in desperate need for a few answers :) Is Pearson Correlation between observed valued and predicted value between 0 and 1 only? Is...

    Started by Ywannah‎, 05-16-2013 10:56 AM
    • Replies: 3
    • Views: 1,640
    05-16-2013, 06:45 PM Go to last post
  46. Where is the problem with my model? Please help!

    Hi, Im trying to run a series of regressions using Gretl. I will use OLS, 2SLS and system-GMM dynamic panel estimator. However there is something...

    Started by yuuhaa‎, 07-13-2012 05:59 AM
    • Replies: 3
    • Views: 2,847
    07-13-2012, 05:01 PM Go to last post
  47. Calculation of effect size in Hierarchical regression

    Hello there, I have conducted a hierarchical regression with two steps. Statistical significance resulted form the first step, as the second...

    Started by YunaniQA‎, 05-29-2013 06:37 AM
    effect size
    • Replies: 3
    • Views: 4,189
    05-29-2013, 11:02 AM Go to last post
  48. Interaction with SPSS - Interpretation of results

    Hi everyone, I am analysing different type of relations between several variables using SPSS. It includes the moderation effect of a variable on...

    Started by yumewa‎, 05-22-2014 06:55 AM
    interaction, regression, spss
    • Replies: 2
    • Views: 1,361
    05-25-2014, 11:18 AM Go to last post
  49. working correlation matrix to use in generalized estimating equations

    I have a design with a between-subject variable (emotion) and within-subject variable (task type), and response data were binary (answer to a task:...

    Started by Yue‎, 04-15-2011 02:41 PM
    • Replies: 0
    • Views: 3,638
    04-15-2011, 02:41 PM Go to last post
  50. Use of regression models with centered variables

    Hi all, I'm a little confused about how to use a regression model with centered variables. I know how centering variables works for reducing...

    Started by Ytrack‎, 01-30-2012 10:37 PM
    centering variables, interaction terms, regression
    • Replies: 6
    • Views: 9,249
    02-01-2012, 12:23 AM Go to last post
  51. Expectation/ Variance/ ACF and PACF in ARMA(2,1)

    Hello guys, I hope I'm not posting in the wrong subforum. I am looking for a solution to calculate E, Var, and ACF and PACF coefficents in an...

    Started by yoz2k3‎, 06-16-2011 05:04 AM
    • Replies: 1
    • Views: 5,463
    06-17-2011, 08:09 PM Go to last post
  52. Multiple linear regression, I seek kind help for a result interpretation :)

    So, I've been struggling with a statistics problem for some time now and was wondering if you could shed some light? The regression's Dependent...

    Started by you_are_awsome‎, 03-30-2017 10:27 AM
    • Replies: 2
    • Views: 671
    03-30-2017, 10:36 AM Go to last post
  53. Holt-Winter forecasting for many future events

    Hello, I have been investigating and testing forecasting methods for incoming call volumes. I have many months of data. The data exhibits a...

    Started by youshouldneverthrowacat‎, 07-24-2012 10:25 AM
    forecasting, holt, triple exponential, winter
    • Replies: 0
    • Views: 2,381
    07-24-2012, 10:25 AM Go to last post
  54. Hypotheses testing if R=1

    Dear all, Since the R value of my regression model is one, I can neither conduct a t-test nor a F-test. Is this a problem with regard to...

    Started by yosi‎, 04-09-2014 06:12 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 25,440
    04-11-2014, 02:30 PM Go to last post
  55. How to use Logistic Regression to get info for Sobel test?

    Hello, Is it possible to use logistic regression to get info for Sobel test, the same way as using linear regression? If so, what are the variables...

    Started by yonikushnir‎, 08-31-2012 11:07 AM
    • Replies: 0
    • Views: 1,352
    08-31-2012, 11:07 AM Go to last post
  56. Likert scale regression

    I have done a likert type survey ( with 5 point scale) and I am facing problems in analysing the data. following is the situation: Both DV and IV...

    Started by yodadcoda‎, 08-12-2013 03:35 PM
    • Replies: 10
    • Views: 2,349
    08-13-2013, 02:53 AM Go to last post
  57. Help with sensibility analysis (event ticketing and advertising influence)

    Hi everybody. I have a task to find out how usage of (advertising investment, PR etc.) different media channels influence on sales of tickets for...

    Started by ynos‎, 03-12-2013 12:46 PM
    • Replies: 0
    • Views: 2,208
    03-12-2013, 12:46 PM Go to last post
  58. Standard Error of Estimate

    I am reading a book called Applied Statistics with Excel by G. Keller. On p593 he wrote Standard Error of Estimate=(SSE/n-k-1)^2, and SSE = sum...

    Started by yma16‎, 08-09-2014 11:45 PM
    • Replies: 7
    • Views: 1,984
    08-10-2014, 08:42 AM Go to last post
  59. Can you predict a categorical outcome with multiple regression?

    Hello - I want to predict an employee will be likely to leave a company based on variables such as tenure, age, function (categorical), # of...

    Started by yichuansancun‎, 11-30-2013 03:58 AM
    • Replies: 1
    • Views: 1,233
    11-30-2013, 06:41 AM Go to last post
  60. Reporting logistic regression results

    Hi, I have a study that aims to find out the association of a binary outcome (e.g. BP control-Y/N) with categorical independent variables e.g....

    Started by Yi Ling‎, 05-25-2015 02:52 AM
    interpretation, logistic regression
    • Replies: 3
    • Views: 2,661
    05-25-2015, 10:29 PM Go to last post

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