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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Math quiz gone horribly wrong...HELP!!!

    I have a math quiz that I did so horrible on that the teacher gave me points for getting my name and the date right out of pity. I was so far off on...

    Started by orangeb‎, 02-08-2006 09:07 AM
    • Replies: 0
    • Views: 2,820
    02-08-2006, 09:07 AM Go to last post
  2. Help with easy stats

    Hi guys I desperately need help revising for my STATS module. We have been given practice exam questions but are not given the answers so I can't...

    Started by borgmeister‎, 04-01-2006 05:52 PM
    • Replies: 0
    • Views: 2,731
    04-01-2006, 05:52 PM Go to last post
  3. Multiple regression least square estimation

    Can someone show me the equations and the derivation of the least square estimation of multiple linear regression? It would be even greater if...

    Started by byip‎, 05-20-2006 11:44 AM
    • Replies: 0
    • Views: 3,748
    05-20-2006, 11:44 AM Go to last post
  4. How do I estimate sales given a multiple regression?

    Hi, I'm doing a problem that involves multiple regression. The question asks me to make an estimate of future sales for 15 stores for 2004, given a...

    Started by Emawk‎, 06-05-2006 06:29 PM
    • Replies: 0
    • Views: 2,901
    06-05-2006, 06:29 PM Go to last post
  5. Plz Help!!!!!!!!!!!!!!!!!!!:(

    HEY GUZ CAN U PLZ HELP ME ON THSES @ PROBLEMS< PLZZZ. 1. Please derive solution of parameter estimation for Multiple Linear Regression Model....

    Started by kal‎, 06-11-2006 07:41 PM
    • Replies: 0
    • Views: 2,642
    06-11-2006, 07:41 PM Go to last post
  6. regression, pairs of random variables

    with observations of an x variable, and a y variable whose expected values lie on a straight line, and whose residual errors are normally...

    Started by lhomer‎, 08-06-2006 12:25 PM
    • Replies: 0
    • Views: 3,268
    08-06-2006, 12:25 PM Go to last post
  7. Durbin watson

    :confused: :confused: i'm in a big big problem? i'm a demonestrator in medical statistics department this week i have to prepare a seminar about...

    Started by Ghada‎, 08-27-2006 03:34 AM
    • Replies: 0
    • Views: 3,862
    08-27-2006, 03:34 AM Go to last post
  8. Help with prediction interval problem

    Construct the indicated prediction interval for an individual y. The equation of the regression line for the paired data below is = 3x and the...

    Started by maharriso‎, 11-13-2006 02:50 PM
    • Replies: 0
    • Views: 7,308
    11-13-2006, 02:50 PM Go to last post
  9. dummy coding help for cat variables

    I have a questionnaire with 28 items - 20 items are Likert attitude questions. In fact there are 5 main variables (constructs?) being measured by 4...

    Started by ehb23‎, 12-06-2006 07:26 PM
    • Replies: 0
    • Views: 4,072
    12-06-2006, 07:26 PM Go to last post
  10. Doing logistic regression using epi-info

    Hi there! I'd really appreciate help with this one. I'm finding the prevalence of anemia and its determinants. There are about 23 factors that...

    Started by confusedmedstudent‎, 12-10-2006 05:01 AM
    • Replies: 0
    • Views: 6,711
    12-10-2006, 05:01 AM Go to last post
  11. Interaction variable in regression

    I'm analyzing data from an experiment in which there are two groups of subjects (patients and controls), and in each group the independent variable...

    Started by rak128‎, 01-31-2007 02:28 PM
    • Replies: 0
    • Views: 2,870
    01-31-2007, 02:28 PM Go to last post
  12. Ancova

    Hello, I'm trying to compare regression models of the same form between three groups. Each model has two continuous independent variables. I need...

    Started by gysr‎, 04-17-2007 09:23 AM
    • Replies: 0
    • Views: 2,150
    04-17-2007, 09:23 AM Go to last post
  13. Anova problems.........please help.thank you

    1.A study has been conducted to determine whether the mean spending for recreational activities during the month of August differs for residents of...

    Started by adeola1820‎, 04-23-2007 12:20 AM
    • Replies: 0
    • Views: 3,659
    04-23-2007, 12:20 AM Go to last post
  14. Need my answers checked.. Am I right? Fingers crossed : )

    Hey everyone, tomororw morning I am doing a statisctics exam but I had a few questions before I go in there. I have been reviewing the slides from...

    Started by crunchy‎, 05-15-2007 06:00 PM
    • Replies: 0
    • Views: 2,206
    05-15-2007, 06:00 PM Go to last post
  15. More than 1 squared term in a regression equation?

    If I have a multiple regression model in which there are more than 1 or 2 terms that are non-linear with the dependent variable Y, then what can I do...

    Started by enman‎, 10-19-2007 11:34 AM
    • Replies: 0
    • Views: 2,851
    10-19-2007, 11:34 AM Go to last post
  16. Regression and metric space

    Hi, I have two independent variables X and Y and one dependent variable Z. X alone explains 45 percent of the variation in Z (Rsquare) and Y...

    Started by senbet‎, 10-29-2007 03:40 PM
    • Replies: 0
    • Views: 3,356
    10-29-2007, 03:40 PM Go to last post
  17. Question Regression Analysis Assignment

    :confused: hi all! I'm new here but I sort of need some help. I have this regression analysis assignment to do using SPSS and stats knowledge...

    Started by Laurence‎, 11-05-2007 09:44 AM
    • Replies: 0
    • Views: 5,149
    11-05-2007, 09:44 AM Go to last post
  18. Cluster Analysis

    Hi all, I have a small sample of 75 participants. I'm conducting an exploratory study looking at psychological distress and gender role...

    Started by cmuhooligan‎, 11-29-2007 11:26 AM
    • Replies: 0
    • Views: 2,801
    11-29-2007, 11:26 AM Go to last post
  19. 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: 4,115
    01-11-2008, 08:14 PM Go to last post
  20. 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: 2,533
    01-11-2008, 10:34 PM Go to last post
  21. Multiple Regression Analysis of a time series

    Hello everyone! I'm trying to use multiple regression analysis of a time series, but I've run into a problem interpreting the data. First, I've...

    Started by minchazo‎, 02-04-2008 05:48 PM
    • Replies: 0
    • Views: 5,857
    02-04-2008, 05:48 PM Go to last post
  22. means versus total scores

    Hi I have a question about using means versus total scores. Is it better to use one or the other when conducting analyses like multiple regression...

    Started by psychologygirl‎, 02-09-2008 12:25 PM
    • Replies: 0
    • Views: 2,150
    02-09-2008, 12:25 PM Go to last post
  23. Multiple Regression Question

    Hello, I am examining the association bertween two independent variables and a dependent variable using multiple regression. My dependent variable...

    Started by psychologygirl‎, 03-10-2008 03:06 PM
    • Replies: 0
    • Views: 2,700
    03-10-2008, 03:06 PM Go to last post
  24. Regression analysis - normal distribution and linearity

    I am using a scale for a paper. The scores are based on 7 questions with Likert-type responses. I want to use it as a dependent variable in a...

    Started by Staticia‎, 05-29-2008 08:32 AM
    • Replies: 0
    • Views: 4,033
    05-29-2008, 08:32 AM Go to last post
  25. Multiple Regression Equation.

    Can someone please tell me if this if correct or not. I'm such an idiot. if i have coefficients of : intercept = -17.514 Food =-0.351...

    Started by el1‎, 05-29-2008 07:57 PM
    • Replies: 0
    • Views: 2,567
    05-29-2008, 07:57 PM Go to last post
  26. Repeated measures in EEG.

    Hello, I am currently working on the analysis of an EEG data set. We measured the EEG signal for 170 verbs and 24 subjects in a picture naming...

    Started by SomeLinguist‎, 06-12-2008 07:07 AM
    • Replies: 0
    • Views: 3,851
    06-12-2008, 07:07 AM Go to last post
  27. Question effect size in hierarchical multiple regression (categorical predictor)

    Hello all So glad to have found this useful forum and have already gotten some clarity on other issues related to the hierarchical regression...

    Started by sybil‎, 07-30-2008 01:23 PM
    • Replies: 0
    • Views: 4,381
    07-30-2008, 01:23 PM Go to last post
  28. Prediction Limits

    Morning everyone. First thread, so take it easy on me. I am using a holt-winters times series to predict future call and transactional volume. ...

    Started by andrew01‎, 09-03-2008 06:48 AM
    • Replies: 0
    • Views: 3,310
    09-03-2008, 06:48 AM Go to last post
  29. URGENT POOLD OLS regression

    ok basically heres the deal. ive used OLS multiple regression on panel data (so ive used a pooled OLS regression.) what i want to know is whats...

    Started by pad1w07@soton.ac.uk‎, 09-20-2008 12:25 PM
    • Replies: 0
    • Views: 2,022
    09-20-2008, 12:25 PM Go to last post
  30. Issues with using composites in linear regression?

    Hi, What sort of issues do I need to consider if I include composites as independent variables in a linear regression? (The composites are averages...

    Started by jts‎, 10-14-2008 10:05 PM
    • Replies: 0
    • Views: 2,352
    10-14-2008, 10:05 PM Go to last post
  31. Is there any limitation on number of predictors if I run stepwise linear regression

    Hi... I need help to solve a problem actually i want to do stepwise linear regression and my predictors are 2279 (differenct combinations of soil...

    Started by Mobushir riaz Khan‎, 10-21-2008 02:40 PM
    • Replies: 0
    • Views: 2,413
    10-21-2008, 02:40 PM Go to last post
  32. multiple comparison issue in linear regression

    I am puzzled by the following question: If you have a 3-level categorical predictor in a linear regression model, you will get 2 estimated...

    Started by nahh‎, 11-05-2008 04:41 PM
    • Replies: 0
    • Views: 2,919
    11-05-2008, 04:41 PM Go to last post
  33. Two-way ANOVA...or not?

    The following data is observed by a building society: No of mortgage applications per month Year 1989 1990 1991 1992 AVERAGE Season...

    Started by sashimi‎, 11-16-2008 06:04 AM
    • Replies: 0
    • Views: 2,174
    11-16-2008, 06:04 AM Go to last post
  34. Unbalanced Sample Sizes

    Given two variables: one is a single estimate measured on one individual, the other is comprised of multiple samples taken from the same individuals...

    Started by scoter‎, 01-12-2009 05:06 PM
    • Replies: 0
    • Views: 2,664
    01-12-2009, 05:06 PM Go to last post
  35. pearson correlation in linear mixed models?

    Hi, I'm trying to understand a research article that used linear mixed models, and I think they have done something wrong. Basically, the...

    Started by williaml‎, 02-24-2009 05:50 AM
    • Replies: 0
    • Views: 3,027
    02-24-2009, 05:50 AM Go to last post
  36. Weird interaction results - need someone's help!

    I ran some hierachical multiple regression in SPSS, and plotted my significant interactions (I have all continuous predictors and outcomes). One of...

    Started by asugrad‎, 03-20-2009 07:33 PM
    • Replies: 0
    • Views: 2,175
    03-20-2009, 07:33 PM Go to last post
  37. Prediction interval behaviour close to the origin

    Hi I have a simple linear regression model, for which I have calculated the Confidence and Prediction Intervals. The model is fixed at the origin...

    Started by cyberbunny‎, 03-21-2009 07:30 AM
    • Replies: 0
    • Views: 2,718
    03-21-2009, 07:30 AM Go to last post
  38. 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...

    Started by skyllberg‎, 03-22-2009 12:39 PM
    • Replies: 0
    • Views: 5,626
    03-22-2009, 12:39 PM Go to last post
  39. Simple Questions

    ...and yet i'm stuck. 1) How would you represent the components of ANOVA of regression in a graphic format,when considering a bivariate...

    Started by jamesmartinn‎, 03-30-2009 11:58 AM
    • Replies: 0
    • Views: 2,230
    03-30-2009, 11:58 AM Go to last post
  40. SPSS multiple regression????

    I want to do a multiple regression , correlating offspring produced on mating one with offspring produced on mating two also with male age at the...

    Started by marigold‎, 04-01-2009 07:24 AM
    • Replies: 0
    • Views: 2,964
    04-01-2009, 07:24 AM Go to last post
  41. Multiple Regression where DV is a proportion

    Hi. I am using multiple regression with 3 continuous predictor Variables, and the Dependent Variables is a proportion (0-1). I'm worrying quite a...

    Started by TheConglomerate‎, 04-13-2009 01:22 AM
    • Replies: 0
    • Views: 2,485
    04-13-2009, 01:22 AM Go to last post
  42. PCA questions

    here goes... 1. The Kaiser-Meyer-Olkin Measure of Sampling Adequacy and Bartlett's Test of Sphericity tests are done on the standardised or the...

    Started by madhatter‎, 04-18-2009 03:47 AM
    • Replies: 0
    • Views: 3,934
    04-18-2009, 03:47 AM Go to last post
  43. Poisson regression with interactions

    I am investigating the risk of getting different forms of leukemia if you live near a hazardous waste site in New York state. I am working with PROC...

    Started by bobban‎, 05-05-2009 04:53 PM
    • Replies: 0
    • Views: 3,848
    05-05-2009, 04:53 PM Go to last post
  44. Validity of setting constant to zero

    Can anyone tell me the validity of setting the constant term to zero to make the other coefficients pass significance? For example, I have been...

    Started by craigpollard‎, 05-06-2009 01:31 AM
    • Replies: 0
    • Views: 2,316
    05-06-2009, 01:31 AM Go to last post
  45. hierarchical multiple regression

    Hi guys, I'm pretty clueless when it comes to stats, so I was wondering if you could help. I'm testing 2 competing theories on personality causes...

    Started by tori‎, 05-30-2009 09:55 PM
    • Replies: 0
    • Views: 2,828
    05-30-2009, 09:55 PM Go to last post
  46. Help Please.

    Suppose that you wish to use a linear regression to predict the dependent variable Y using the dependent variable X1. You collect a scatter plot of...

    Started by btnh33‎, 06-03-2009 06:06 PM
    • Replies: 0
    • Views: 1,946
    06-03-2009, 06:06 PM Go to last post
  47. Regression Help

    OK, attached is the regression problem. It has multiple items to calculate. My problem is I am not sure if I calculated #1 and #2 correctly in...

    Started by TEE323‎, 06-07-2009 04:35 PM
    • Replies: 0
    • Views: 1,675
    06-07-2009, 04:35 PM Go to last post
  48. Poisson regression

    Hello, Is it possible to do a Poisson regression with only 6 observations? What is the minimum number of observations possible? Giovanna

    Started by Giovanna‎, 06-18-2009 05:48 AM
    • Replies: 0
    • Views: 3,382
    06-18-2009, 05:48 AM Go to last post
  49. Attempting the Impossible? Please help!

    I've been tasked with conducting a statistical analysis and have encountered a few potentially significant problems. As its been quite some time...

    Started by carriedinterest‎, 07-07-2009 08:21 AM
    • Replies: 0
    • Views: 2,391
    07-07-2009, 08:21 AM Go to last post
  50. Please explain differences between R and r

    Hello, I received my dissertation back with comments from the dean. He flagged the following text and added the following comments: Am I...

    Started by lph2005‎, 07-17-2009 11:48 PM
    • Replies: 0
    • Views: 8,237
    07-17-2009, 11:48 PM Go to last post
  51. Simple Linear Regression with GUM Uncertainties

    I would appreciate it if someone could suggest some references that discuss how to formally incorporate measurement uncertainties (as calculated per...

    Started by Tom La Bone‎, 07-23-2009 04:31 PM
    • Replies: 0
    • Views: 4,300
    07-23-2009, 04:31 PM Go to last post
  52. Ordinal Logistic Regression and Bimodality

    Hello, I'm running ordinal logistic regressions with survey weights. I was under the impression that there are no distributional assumptions for...

    Started by trafalgar‎, 07-24-2009 01:28 PM
    • Replies: 0
    • Views: 4,338
    07-24-2009, 01:28 PM Go to last post
  53. relationship between test conditions and time to failure using linear regression

    Hello all, I'm Tom and i've decided it'd be a good idea to join this forum as i'm just about to start my third year of my degree in september; a Beng...

    Started by t0mmm‎, 08-04-2009 06:39 AM
    • Replies: 0
    • Views: 1,676
    08-04-2009, 06:39 AM Go to last post
  54. Dependent / conditional regression?

    Hi there! Long time lurker, first time poster (first post in ANY board), so my sincerest apologies if I'm doing anything wrong! I have searched...

    Started by Murphy-dk‎, 08-11-2009 05:23 AM
    • Replies: 0
    • Views: 2,024
    08-11-2009, 05:23 AM Go to last post
  55. Moderation graphs

    Hi all, (I hope I'm posting this in the right sub-forum) I have two data sets for which I've done hierarchical regression analysis to test for...

    Started by darc‎, 09-02-2009 06:10 AM
    • Replies: 0
    • Views: 13,066
    09-02-2009, 06:10 AM Go to last post
  56. help with interpretation of multiple regression results

    Dear forum members, I am running multiple regressions with SPSS and I need help with possible interpretation of my results. Firm...

    Started by metanex‎, 09-03-2009 02:19 AM
    • Replies: 0
    • Views: 3,416
    09-03-2009, 02:19 AM Go to last post
  57. mahalanobis distance critical values > 10 df

    dear all, analysing my dataset (N=1056) with SPSS for my Ph.D., I'm currently testing with linear multiple regression. before entering a...

    Started by hbos‎, 09-03-2009 09:58 AM
    • Replies: 0
    • Views: 10,799
    09-03-2009, 09:58 AM Go to last post
  58. predicting X using multiple regression?

    Hello: I have been reviewing a study in which Multiple Linear Regression (MLR) was used to evaluate the relationship between the concentration of...

    Started by AquaMan‎, 09-11-2009 04:56 PM
    • Replies: 0
    • Views: 2,048
    09-11-2009, 04:56 PM Go to last post
  59. Time-series analysis with three variables

    :wave:I have some time-series across three variables. I want to see the association of two variables while controlling for a third. I am using SPSS...

    Started by jimd@uic.edu‎, 10-13-2009 08:26 AM
    • Replies: 0
    • Views: 3,468
    10-13-2009, 08:26 AM Go to last post
  60. Latent growth process

    Hi, I'm starting a study investigating the use of several medical imaging measurements taken pre-treatment to predict treatment outcome. Treatment...

    Started by parkej‎, 10-15-2009 03:51 PM
    • Replies: 0
    • Views: 1,577
    10-15-2009, 03:51 PM Go to last post

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