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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Regression Equation Porblem

    My regression equation doesn't seem to be matching up with my model/data. My equation is y= -11.844+0.559(x). I ran this regression in excel...

    Started by chocpretz‎, 12-03-2013 01:16 AM
    • Replies: 4
    • Views: 1,857
    12-03-2013, 02:26 PM Go to last post
  2. Exclamation Regression between perceptual data on service quality and time series data

    Dear forum experts, My problem is how to do a regression between service quality collected on a seven point Likert scale using a questionnaire...

    Started by lonehussian‎, 12-03-2013 07:03 AM
    • Replies: 0
    • Views: 1,365
    12-03-2013, 07:03 AM Go to last post
  3. Goodness of fit for Mixed effects Logistic Regression

    Dear all, I am trying to assess the goodness of fit of random effects Logistic regression. a) I would have used a Hosmer-Lemeshow test, but how...

    Started by ledzep‎, 12-02-2013 06:15 PM
    • Replies: 4
    • Views: 5,756
    12-02-2013, 09:52 PM Go to last post
  4. Logistic Regression: attaching 95% CI to predicted probabilities

    Hi All, I was wondering how calculate 95% CI for predicted probabilities. I have read how to do the same for odd-ratios, but the way in which what...

    Started by gianmarco‎, 12-01-2013 11:51 AM
    • Replies: 6
    • Views: 9,774
    12-02-2013, 04:54 PM Go to last post
  5. Non-normal data, box-cox transformation

    Dear Forum members, I have some data on board members, specifically how many board members are female (percentages). This leads to a lot of zero...

    Started by Jdijkers‎, 11-25-2013 03:00 PM
    • Replies: 3
    • Views: 2,125
    12-02-2013, 10:38 AM Go to last post
  6. Which model to use?

    Yes, it's the age-old question of which model to use. I'm not sure if it belongs in this forum section (there are two others where it might fit;...

    Started by Wendero‎, 12-01-2013 09:28 PM
    • Replies: 0
    • Views: 1,166
    12-01-2013, 09:28 PM Go to last post
  7. Logistic regression: how to get ORs and CIs for non-included variables

    I'm working on a modeling project using logistic regression with forward selection. I would like to be able to determine the odds ratios and...

    Started by madformath‎, 11-30-2013 11:29 AM
    • Replies: 8
    • Views: 3,268
    12-01-2013, 09:18 PM Go to last post
  8. 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: 1,434
    12-01-2013, 07:59 AM Go to last post
  9. [Linear Regression, Theory] Adequacy of Simpler Linear Regression model

    Hi Folks, That's my first post so bear with me. Also, apologies in advance for the basic question, but rummaging through Wikipedia, YouTube (which...

    Started by vn32427‎, 11-28-2013 05:33 PM
    linear regression;
    • Replies: 1
    • Views: 2,537
    12-01-2013, 12:18 AM Go to last post
  10. Standard Error Correction in Two-Stage Estimation

    There have been many papers on error corrections for two-stage estimation, such as Murphy-Topel (85). The basic model proceeds as follows: Stage 1:...

    Started by CarpenterT‎, 11-30-2013 11:18 PM
    error correction, murphy-topel, two-stage ols
    • Replies: 0
    • Views: 2,662
    11-30-2013, 11:18 PM Go to last post
  11. 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: 1,215
    11-30-2013, 06:41 AM Go to last post
  12. Predict group B membership from group membership A

    Hi there, I have an interesting case to solve and I'm very curious to understand how I can implement it. I've done study where a number of...

    Started by ilaria‎, 11-29-2013 06:19 AM
    • Replies: 2
    • Views: 1,663
    11-29-2013, 11:29 AM Go to last post
  13. significance value

    Hi I am conducting a multiple logistic regression analysis. The idea is that whatever variables emerge significant in the univariate logistic...

    Started by stats65‎, 11-28-2013 10:12 PM
    • Replies: 1
    • Views: 1,193
    11-29-2013, 06:12 AM Go to last post
  14. z-Transformation and interpretation

    My independent variables are mainly measured in percentages but also Euro and Age. Do I need to do a z-transformation? And how can I interprete...

    Started by Abigail‎, 11-28-2013 04:59 PM
    • Replies: 0
    • Views: 1,174
    11-28-2013, 04:59 PM Go to last post
  15. Panic!Please help with co-occurrence

    I have two categorical predictors (gender 0,1 and exercise 0,1) and a categorical outcome variable (asthma 0,1). Please someone tell me how to...

    Started by No-idea‎, 11-27-2013 05:14 PM
    • Replies: 0
    • Views: 1,293
    11-27-2013, 05:14 PM Go to last post
  16. Choosing test for longitudinal, repeated measures and clustered data

    Hi everyone! I'm a researcher within cardiovascular medicine, currently working on a study in endocrinology (diabetes). I have the following...

    Started by Adam1‎, 11-27-2013 05:10 PM
    longitudinal data, repeated measures
    • Replies: 0
    • Views: 1,317
    11-27-2013, 05:10 PM Go to last post
  17. equation -regression analysis. Please Help.

    Please see below and let me know if the general equations for a straight line match with the following research questions. Research Question 1....

    Started by eunkum‎, 11-27-2013 03:10 PM
    • Replies: 0
    • Views: 1,147
    11-27-2013, 03:10 PM Go to last post
  18. 'Significant' product-term interaction but no significant simple main effect contrast

    :wave: I'm conducting a conditional logistic regression to assess the association between a continuous predictor and a dichotomous outcome,...

    Started by Prof.B.‎, 11-25-2013 04:43 PM
    contrasts, interaction, logistic regression, sas
    • Replies: 6
    • Views: 4,064
    11-26-2013, 07:43 PM Go to last post
  19. Using Orthogonal Polynomials to remove multicollinearity

    Hi I have a homework about using orthogonal polynomials to remove multicollinearity in polynomial models. I've found the concept of polynomial...

    Started by diba‎, 11-26-2013 01:53 PM
    multicollinearity, orthogonal polynomials
    • Replies: 0
    • Views: 1,702
    11-26-2013, 01:53 PM Go to last post
  20. Time Series Regression

    Hi Guys I am doing time series regression Had tried to find the order of correlation but the ACF function is a cyclical one (line a sine curve)...

    Started by Sizor Mohanty‎, 11-11-2013 10:19 AM
    • Replies: 11
    • Views: 2,381
    11-25-2013, 05:50 PM Go to last post
  21. Modelling a Regression

    For an assignment, I am trying to regress log(wage) on: gender, years of education, race Gender and Race are qualitative variables and years of...

    Started by michael38‎, 11-24-2013 12:47 PM
    • Replies: 3
    • Views: 1,737
    11-24-2013, 05:26 PM Go to last post
  22. Multiple regression analysis-coefficient table

    Hi, I am currently working on a project which requires a multiple regression analysis (using enter-standard method) and I am stuck with...

    Started by Elina‎, 11-22-2013 11:35 AM
    • Replies: 5
    • Views: 1,877
    11-22-2013, 04:55 PM Go to last post
  23. Relationship between correlation results and regression results

    Hello, How is it possible that in correlation analysis many variables are statistically correlated to the variable under consideration but in the...

    Started by Bahareh‎, 11-22-2013 12:15 PM
    • Replies: 2
    • Views: 1,210
    11-22-2013, 03:10 PM Go to last post
  24. Regression help!

    Please could somebody help with any of the following questions? Im having a lot of difficulty with the regression calculations and dont even know...

    Started by qswdef‎, 11-20-2013 07:24 AM
    • Replies: 3
    • Views: 1,732
    11-22-2013, 09:19 AM Go to last post
  25. Exponential Regression

    Hey everyone, I'm new to this forum since I came to a roadblock with some studies and looking for some suggestions and help. Attached is a...

    Started by Jess Bryans‎, 11-21-2013 01:22 PM
    • Replies: 0
    • Views: 1,125
    11-21-2013, 01:22 PM Go to last post
  26. Logit Regression Odds when some possible outcomes have been removed

    This is my first post of this forum. I'm working on a Logit Regression to predict the nominees and winners of various movie awards. Luckily, I...

    Started by harmonica2‎, 11-18-2013 09:10 PM
    • Replies: 6
    • Views: 1,689
    11-20-2013, 11:46 PM Go to last post
  27. 2SLS regression model

    I have a query about instrumental variable (IV) and 2SLS (actually three stage) regression. I am trying to estimate effect of core team(a group of 5...

    Started by divyajoshi1001‎, 11-17-2013 04:06 PM
    2sls regression mode
    • Replies: 3
    • Views: 1,862
    11-20-2013, 09:41 PM Go to last post
  28. How to interpret time dummies in simple difference in difference regression

    Please delete this post.

    Started by melisah‎, 11-20-2013 08:11 PM
    • Replies: 0
    • Views: 1,397
    11-20-2013, 08:11 PM Go to last post
  29. Different p-values with different procedures

    Fairly novice in statistics, so this will surely have a simple explanation. I ran bivariate analyses to check for normality of a series of variables...

    Started by RNG‎, 11-19-2013 06:16 PM
    general linear model, generalized linear model, linear regression, logistic regression, p-values
    • Replies: 1
    • Views: 1,371
    11-20-2013, 01:15 PM Go to last post
  30. Interpreting d reference category of logistic regression SPSS & other output results

    Hi there, could you kindly help me to understand what my reference category and regression equation resulsts are saying. I have run a...

    Started by tolegittoquit‎, 11-19-2013 04:34 PM
    • Replies: 0
    • Views: 2,474
    11-19-2013, 04:34 PM Go to last post
  31. Linear correlation coefficient with a yes or no variable...

    Please pardon my ignorance as I have not had statistics in 20 years. I would like to attempt correlate student GPA with use of an ipod during school...

    Started by tomgallopavo‎, 11-19-2013 12:28 PM
    • Replies: 5
    • Views: 2,417
    11-19-2013, 01:14 PM Go to last post
  32. Paired t-test - Inferring causality between two variables (before/after)

    Hi, Suppose I have the following data measuring Gene expression (how active the gene is) and blood value (for example Very Low Density...

    Started by capocrimini‎, 11-19-2013 06:23 AM
    • Replies: 0
    • Views: 1,646
    11-19-2013, 06:23 AM Go to last post
  33. What test if no linearity

    Dear forum members, I am currently struggling with my research about boardmembers and their influence on the strategy. From other articles I...

    Started by Jdijkers‎, 11-18-2013 10:14 AM
    2 Pages
    1 2
    • Replies: 20
    • Views: 3,257
    11-18-2013, 04:15 PM Go to last post
  34. Two important questions

    I now have a good model fit with R2 >=0.90 and P value < 0.05. I have 2 important questions. 1) How do i forecast independent variables to in...

    Started by shaju304‎, 11-18-2013 06:52 AM
    • Replies: 1
    • Views: 1,300
    11-18-2013, 08:50 AM Go to last post
  35. Question If a potential third variable is a function of two others, is necessarily redundant?

    Say I am using regression analysis to try and estimate the assembly time for widgets (which can be produced in various sizes) given some possible...

    Started by rbradford‎, 11-16-2013 05:34 PM
    variable selection, variables
    • Replies: 1
    • Views: 1,401
    11-18-2013, 08:46 AM Go to last post
  36. How to interpret a discontinuous Q-Q plot with jump

    Hello, I am currently generating some plots to test whether the given linear model meets all the theoretical assumptions of linear regression. One...

    Started by JDneverSleeps‎, 11-17-2013 09:20 PM
    linear regression
    • Replies: 1
    • Views: 3,094
    11-17-2013, 10:22 PM Go to last post
  37. Lags and forcasting performance in ADL model

    ... Delete

    Started by Mepp‎, 11-17-2013 01:28 PM
    • Replies: 0
    • Views: 1,138
    11-17-2013, 01:28 PM Go to last post
  38. GLLAMM syntax for using instruments

    I am seeking help to write the GLLAMM command to estimate y1 = x1 x2 x1*x2 x3; switching equation is x1 = x2 x3 x4 x5, where y1 is the outcome...

    Started by Desmond‎, 11-17-2013 12:31 PM
    gllamm, instrumental variables.
    • Replies: 0
    • Views: 1,321
    11-17-2013, 12:31 PM Go to last post
  39. Bias in Regression Parameter Estimates

    Hi, I am new to Statistics. Currently, I am working on a project that involves missing data analysis. I want to know how to quantify bias for...

    Started by krishmar1‎, 11-17-2013 11:28 AM
    • Replies: 0
    • Views: 1,512
    11-17-2013, 11:28 AM Go to last post
  40. why the first two regressions are not enough and why the other two are

    we want to see if there is income convergence when trade liberalization takes place. we use two measures. . The fi rst is the standard deviation of...

    Started by eac13‎, 11-17-2013 05:19 AM
    • Replies: 0
    • Views: 1,024
    11-17-2013, 05:19 AM Go to last post
  41. is it possible to regress power variables?

    Guys I was wondering if this is possible? Assume I would like estimate regression: Y=a1+a2*x2+a3*x3+a4*x4^x5+ei Is it possible? the purpose is...

    Started by raufhon‎, 11-16-2013 02:58 AM
    • Replies: 3
    • Views: 1,589
    11-17-2013, 02:22 AM Go to last post
  42. Error estimate for prediction from regression

    I am working with SPSS and I have performed a multiple linear regression with 3 predictors. I am trying to calculate a 95% confidence level error...

    Started by rim‎, 11-15-2013 08:46 PM
    • Replies: 0
    • Views: 1,235
    11-15-2013, 08:46 PM Go to last post
  43. Trying to interpret my results

    I have to find out who the movers and shakers are of the middle eastern stock markets ive ran a regression analysis of the prices indices in local...

    Started by daniblu7‎, 11-15-2013 04:23 AM
    • Replies: 3
    • Views: 1,316
    11-15-2013, 10:31 AM Go to last post
  44. Appropriate MANCOVA interaction graph

    Hi all, I was hoping to get some help with how best to graph my MANCOVA interaction. I know performing this with univariate data (ANCOVA) is...

    Started by michaela‎, 11-14-2013 10:38 PM
    • Replies: 0
    • Views: 1,469
    11-14-2013, 10:38 PM Go to last post
  45. 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: 1,550
    11-14-2013, 02:37 AM Go to last post
  46. beta = r, so can beta be greater than 1.0?

    I have a basic question, but it's been a long time since I learned regression. I'm having trouble reconciling these three facts: (1) In a...

    Started by bruin‎, 11-11-2013 03:40 PM
    • Replies: 13
    • Views: 4,127
    11-14-2013, 01:15 AM Go to last post
  47. Many Level Categorical Variables

    Hello All, I am trying to perform multiple regression on some sales data and want to make sure that I am coding the variables correctly. ...

    Started by statdude13‎, 11-10-2013 02:58 AM
    • Replies: 1
    • Views: 1,231
    11-13-2013, 08:26 PM Go to last post
  48. 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: 3,077
    11-13-2013, 05:05 PM Go to last post
  49. Can I analyse R-SQ values for different groups using a T-Test?

    Hi, I am currently doing a piece of analysis which is now starting to confuse me in terms of what statistical analysis I should apply. My Data:...

    Started by mandeep63‎, 11-13-2013 10:52 AM
    • Replies: 0
    • Views: 1,392
    11-13-2013, 10:52 AM Go to last post
  50. How can I find out how shifts in a country's fiscal policies affect economic health.

    I have the values of below variables for 20 years for different countries. Could anyone suggest how I should go about this?How can I use regression...

    Started by CodeBee‎, 11-09-2013 03:02 AM
    regression analysis, statistical model, timeseries analysis
    • Replies: 1
    • Views: 1,276
    11-12-2013, 08:29 AM Go to last post
  51. All for one, one for all categorical variable?

    Hi everyone, I'm working on a classification model with logistic regression. Here are two independent variables we are looking at: id, sales,...

    Started by Oberon‎, 11-08-2013 11:48 PM
    • Replies: 1
    • Views: 1,255
    11-12-2013, 08:23 AM Go to last post
  52. Post Should I use regression or logit

    Hi Guys, I need to find out the influence of factors affecting female labour force participation. I thought to take female labour force...

    Started by binupv‎, 11-08-2013 11:19 PM
    • Replies: 2
    • Views: 1,730
    11-12-2013, 08:18 AM Go to last post
  53. The correct regression analysis?

    Im working on a large data set for my masters and I just wanted some advice on what would be the best analysis to do for the example below: If I...

    Started by loops22‎, 11-11-2013 06:49 AM
    • Replies: 0
    • Views: 1,168
    11-11-2013, 06:49 AM Go to last post
  54. 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: 1,229
    11-09-2013, 12:22 PM Go to last post
  55. Interpretation of SPSS results

    Hi all, I am working on my master thesis but I have problems with the interpretation of my results and I hope someone could help me. I am performing...

    Started by Nicole1989‎, 11-09-2013 10:05 AM
    • Replies: 0
    • Views: 1,064
    11-09-2013, 10:05 AM Go to last post
  56. Log-linear model with negative values

    I would like to estimate a log-linear model which contains negative values in the dependant variable. The only advice I've seen is to add a constant...

    Started by agsalomon‎, 11-09-2013 02:57 AM
    • Replies: 0
    • Views: 1,105
    11-09-2013, 02:57 AM Go to last post
  57. need help in some questions

    need help in cobb douglas function can you please help me i have question in image quality thank you so much please reply so i put imaeg for query

    Started by numerospy‎, 11-08-2013 06:57 PM
    • Replies: 0
    • Views: 1,155
    11-08-2013, 06:57 PM Go to last post
  58. Regression Methods

    Hello, I have 1 dependent variable and 30 independent variables. I used forward method for selecting the important variables. The Adjusted R square...

    Started by Bahareh‎, 11-01-2013 03:01 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 3,486
    11-07-2013, 04:59 PM Go to last post
  59. How to model large multivariate dataset

    I have a years worth of data at a manufacturing plant with 20 predictor variables and 8 response variables that I'm interested in. A number of the...

    Started by bjbreitling‎, 11-07-2013 10:42 AM
    multiple regression
    • Replies: 2
    • Views: 1,360
    11-07-2013, 12:46 PM Go to last post
  60. regression analysis to measure TV advertising effectiveness

    Hi, I am running a TV advertising analysis where I want to measure if having a 5 day advertising campaign or 7 day advertising campaign would be...

    Started by jennxf‎, 11-06-2013 02:05 AM
    • Replies: 1
    • Views: 2,048
    11-07-2013, 08:40 AM Go to last post

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