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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Did i get theese right i am confused, can anyone help me please

    25. In multiple regression analysis, residual analysis is used to test the requirement that A) the variation in the residuals is the same for all...

    Started by Bicano‎, 11-30-2008 08:26 PM
    • Replies: 2
    • Views: 19,938
    11-30-2008, 09:08 PM Go to last post
  2. Testing for difference 2 regression models

    Hello, I am working on multiple regressions at the moment and have come to a point that I need a little assistance. I have the following question:...

    Started by devreede‎, 11-28-2008 12:16 PM
    • Replies: 8
    • Views: 23,381
    11-29-2008, 11:29 AM Go to last post
  3. Looking for mult. linear regression equations

    Hi - I'm having trouble finding the equations for the coefficients for a multiple linear regression with two independent variables (a=, b1=, b2=). ...

    Started by dave25‎, 11-26-2008 07:28 PM
    • Replies: 1
    • Views: 2,082
    11-26-2008, 08:13 PM Go to last post
  4. Cool Multiple Regression with Multiple Groups

    Hello, I am looking at predictor variables (scores on partner perception measures) on a criterion variable (relationship satisfaction), in order to...

    Started by Shadow3758‎, 11-26-2008 05:35 PM
    • Replies: 9
    • Views: 4,262
    11-26-2008, 06:58 PM Go to last post
  5. Independent variables correlate to each other: violation of regression assumoptions?

    Ok, so bear with me - total statistical idiot here, in way over his head. I'm running multiple regressions of plant cover against precipitation,...

    Started by Charlie‎, 11-13-2008 03:37 PM
    • Replies: 11
    • Views: 12,301
    11-19-2008, 10:17 AM Go to last post
  6. Help needed with ANOVA analysis

    ANOVA df SS MS F Significance F Regression 6 5510.4 918.4 11.67 0.0081 Residual 5 393.2 78.65 Total ...

    Started by d.g.aspinall‎, 11-17-2008 07:46 PM
    • Replies: 1
    • Views: 3,471
    11-18-2008, 03:32 PM Go to last post
  7. 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: 1,452
    11-16-2008, 06:04 AM Go to last post
  8. Muliple regression - lets try again

    I posted a question earlier (variable transformation) and am wondering if I didn't explain myself very well. Here's a more straighforward and paired...

    Started by statishtics‎, 08-20-2008 01:30 PM
    • Replies: 2
    • Views: 1,891
    11-13-2008, 07:26 PM Go to last post
  9. Calculations for the unstandardized coefficients for a multiple regression analysis

    I am looking to write a spreadsheet of the calculations for the unstandardized coefficients for a multiple regression analysis (the B values). ...

    Started by Baggies‎, 11-10-2008 03:54 AM
    • Replies: 3
    • Views: 16,367
    11-11-2008, 04:53 AM Go to last post
  10. calculating multiple regression by hand

    How would you calculate a regression equation such as Y = b1X1 + b2X2 + b3X3 + a by HAND??? I can find in textbooks the way to calculate two...

    Started by HCrazy‎, 11-10-2008 11:52 PM
    • Replies: 1
    • Views: 19,015
    11-11-2008, 12:04 AM Go to last post
  11. Factor analysis with non-normal distribution?

    Hi all, Does anyone know an alternative to factor anlysis for non-normal distrbutions which explores factors or clusters on a set of 64...

    Started by Wiggy‎, 11-06-2008 05:59 AM
    • Replies: 3
    • Views: 13,598
    11-06-2008, 02:26 PM Go to last post
  12. 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: 2,190
    11-05-2008, 04:41 PM Go to last post
  13. 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: 1,568
    10-21-2008, 02:40 PM Go to last post
  14. Standard Deviation or Response / Prediction - Linear Regression

    Hi, I'm hoping someone out there can help me with what is probably a very simple question. For a stats assignment, I've created a linear...

    Started by dzeni‎, 10-05-2008 06:28 PM
    • Replies: 4
    • Views: 9,826
    10-20-2008, 04:47 AM Go to last post
  15. Help!

    Hi, I'm in the social sciences (psych) using cross sectional data. I'm completing a multiple hierarchical regression looking at interaction...

    Started by statishtics‎, 10-15-2008 05:12 PM
    • Replies: 3
    • Views: 1,563
    10-16-2008, 07:49 AM Go to last post
  16. 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: 1,533
    10-14-2008, 10:05 PM Go to last post
  17. Repeated measures - appropriate for my study or not?

    Howdy folks - first time poster here. I'm a grad student at CU-Boulder working on grassland ecology and need some assistance. I've got six...

    Started by Charlie‎, 10-09-2008 01:58 PM
    • Replies: 1
    • Views: 2,006
    10-10-2008, 01:23 AM Go to last post
  18. Question Testing suppression with SEM

    hey everybody Using multiple regression analysis on my data, I've discovered a suppression effect. Now I started analyzing the same data with...

    Started by piweli‎, 09-04-2008 04:30 AM
    • Replies: 1
    • Views: 5,083
    09-30-2008, 10:27 AM Go to last post
  19. AM I allowed to do this?

    Basically i have a binary variable called DP ( takes values 0 or 1) that i had to drop from my multiple regression due to few observations with of...

    Started by pad1w07@soton.ac.uk‎, 09-18-2008 07:36 AM
    • Replies: 1
    • Views: 1,611
    09-22-2008, 06:06 PM Go to last post
  20. brain freeze.....

    im having a really stupid moment, but what does it mean when a multiple regression coeffecient is insignificant. say hair colour is found to be...

    Started by pad1w07@soton.ac.uk‎, 09-22-2008 06:07 AM
    • Replies: 1
    • Views: 1,581
    09-22-2008, 09:15 AM Go to last post
  21. 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: 1,575
    09-20-2008, 12:25 PM Go to last post
  22. Simple CORRELATION query

    hi. i am analysing my data using a correlation matrix, and then multiple regression. I have noticed that some of my correlation co-effecients are...

    Started by pad1w07@soton.ac.uk‎, 09-19-2008 03:40 AM
    • Replies: 1
    • Views: 1,768
    09-19-2008, 12:11 PM Go to last post
  23. A quick regression QUESTION

    Hi i just have a really simple question regarding multiple regression. i have a independant variable called DPR that is the dividend payout ratio...

    Started by pad1w07@soton.ac.uk‎, 09-15-2008 12:06 PM
    • Replies: 2
    • Views: 1,823
    09-16-2008, 03:10 AM Go to last post
  24. Unhappy Unstandardized regression coefficient in Multiple Regression Interaction

    Hi all, I am trying to interpret a significant cross product interaction in a Multiple Regression and I am getting more and more confused. There...

    Started by suliman‎, 09-05-2008 11:57 PM
    • Replies: 1
    • Views: 7,811
    09-06-2008, 01:01 AM Go to last post
  25. 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: 1,975
    09-03-2008, 06:48 AM Go to last post
  26. Number of IV's in multiple regressions: How many is 'too many'?

    Hello I need to run a number of individual regressions and am trying to decide how to break them down. I was wondering whether there is a limit...

    Started by gemma7‎, 09-02-2008 07:00 AM
    • Replies: 2
    • Views: 3,046
    09-02-2008, 03:51 PM Go to last post
  27. very basis question

    Hi guys, one very basic question: what is the actual difference between simple linear regression and univariate analysis? examples would be...

    Started by nelson‎, 08-31-2008 11:57 AM
    • Replies: 3
    • Views: 2,033
    09-01-2008, 08:25 AM Go to last post
  28. Centering and transforming

    Hello, I'm performing a multiple regression analysis and have a question about transforming variables. I am using two IVs to see if there are...

    Started by statishtics‎, 08-27-2008 03:45 PM
    • Replies: 1
    • Views: 1,980
    08-28-2008, 05:05 AM Go to last post
  29. how to enter certain data, and should i use t test?

    Hi all,:wave: I'm new here and need life saving help with my MEd dissertation! I'm studying moral development (SRMS SCORE) and play opportunities...

    Started by ladyt‎, 08-16-2008 08:10 AM
    • Replies: 2
    • Views: 3,657
    08-18-2008, 04:38 AM Go to last post
  30. Post Check and develop my answers, multiple regression

    This is the question, i was wondering if anyone could check if i did the correct thing, and help me develop my written answers if needed. a)...

    Started by Mosphaitus‎, 08-17-2008 08:22 AM
    • Replies: 4
    • Views: 4,807
    08-17-2008, 12:49 PM Go to last post
  31. Help with Multiple Regression

    Hi all, im struggling with what to do with this multiple regression question, any help tips or pointers would be greatly appreciated! Am i...

    Started by Mosphaitus‎, 08-15-2008 08:35 AM
    • Replies: 6
    • Views: 2,674
    08-16-2008, 12:43 PM Go to last post
  32. Statistics Help (Invoice Question)

    Please help! The manager of the purchasing department of a large banking organization would like to develop a model to predict the amount of time...

    Started by student00‎, 08-12-2008 02:55 PM
    • Replies: 4
    • Views: 4,498
    08-13-2008, 08:05 PM Go to last post
  33. 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...

    Started by jediclampet‎, 02-19-2008 01:58 PM
    • Replies: 1
    • Views: 1,790
    08-12-2008, 02:41 PM Go to last post
  34. Multiple Regression

    Hi, I am doing regression for dependent variable Y and independent variables X1, X2, X3 and X4. Y is the weekly stock price of a company which...

    Started by a_quantum‎, 08-04-2008 03:00 AM
    • Replies: 4
    • Views: 1,858
    08-06-2008, 03:39 AM Go to last post
  35. Meaning of T-Ratio and parameter standard error in HLM analysis

    Hello. I've recently used an Hierachical Linear Modeling (HLM aka mixed modeling) analysis method to look at some data. I'm only just beginning to...

    Started by jonblazn‎, 07-31-2008 11:38 AM
    • Replies: 2
    • Views: 15,306
    08-02-2008, 10:34 PM Go to last post
  36. 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: 3,566
    07-30-2008, 01:23 PM Go to last post
  37. Unhappy Very basic questions on some terms.

    I apologize if this is a little too basic for you, but I'm an RN taking statistics ovr the summer and my brain just doesn't work like this. My...

    Started by smarge117‎, 07-12-2008 03:50 PM
    • Replies: 6
    • Views: 2,211
    07-13-2008, 07:25 PM Go to last post
  38. Exclamation Coefficients and standard deviations

    Hi, I have seen in a paper that the author states that the coefficient he gets in a regression implies that an increase of one standard deviation...

    Started by bobesp‎, 07-02-2008 03:52 PM
    • Replies: 2
    • Views: 7,937
    07-05-2008, 04:58 PM Go to last post
  39. Regression questions

    I have answered the questions below can someone please check them to make sure i have them right. I have answered the questions but need to have...

    Started by CREATIONS‎, 06-27-2008 01:29 AM
    • Replies: 2
    • Views: 20,997
    06-27-2008, 09:27 AM Go to last post
  40. F-Statistic Question

    I'm sorry for probably asking a foolish question, but my searches have yielded very limited results (as well as my reading) in regards to the...

    Started by dfrisch‎, 05-28-2008 12:30 PM
    • Replies: 6
    • Views: 23,022
    06-23-2008, 03:28 PM Go to last post
  41. statistics problem

    I am stumped on how to go about making the test statistic for this problem. Any help would be appreciated. Thank you. Suppose that you would like...

    Started by rambo67‎, 06-11-2008 09:17 PM
    • Replies: 7
    • Views: 2,898
    06-12-2008, 05:56 PM Go to last post
  42. multiple regression model

    I think 'C' is the answer.. does it look reasonable?

    Started by wasupbaby2‎, 06-12-2008 04:33 PM
    • Replies: 1
    • Views: 1,703
    06-12-2008, 05:19 PM Go to last post
  43. 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: 2,525
    06-12-2008, 07:07 AM Go to last post
  44. 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: 1,647
    05-29-2008, 07:57 PM Go to last post
  45. Increasing variance in linear regression

    Hi, I have a response and a predictor variable, weight and height, to which I've fitted a linear regression. The relationship appears to be...

    Started by Statstastic‎, 05-28-2008 10:26 AM
    • Replies: 6
    • Views: 10,422
    05-29-2008, 09:33 AM Go to last post
  46. 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: 2,825
    05-29-2008, 08:32 AM Go to last post
  47. multiple comparisons with multiple regressions?

    Hi there, I'm hoping that someone can answer my query or point me in the direction of a reliable source to find out more. My question is - Is the...

    Started by meema‎, 05-26-2008 09:23 AM
    • Replies: 3
    • Views: 2,553
    05-27-2008, 08:36 AM Go to last post
  48. Damage Assessment

    I apologize for this question being exceedingly vague, but I'm not sure of the correct terminology. After running a regression analysis, I have...

    Started by DCohen‎, 05-23-2008 03:17 PM
    • Replies: 4
    • Views: 1,835
    05-25-2008, 09:07 AM Go to last post
  49. Regression Analysis

    I am looking for a Introductory Regression Analysis book. The extent of my education is Elementary Stats in college, is there more knowledge, of...

    Started by frailjar7‎, 05-25-2008 07:33 AM
    • Replies: 1
    • Views: 1,921
    05-25-2008, 08:59 AM Go to last post
  50. Doubt regarding Multiple Regression

    Hi, I have some doubt in Multiple regression. I have Y as the dependent variable (mutual fund returns) I have many independent variables...

    Started by akshay_ajmani‎, 04-20-2008 03:40 PM
    • Replies: 2
    • Views: 2,035
    04-24-2008, 01:13 PM Go to last post
  51. Dissertation help with Likert scale

    Hello, I'm having some problems with the stats for my dissertation. My dissertation is about the effect of the physical surroundings of a...

    Started by Bunecarera‎, 04-15-2008 05:28 AM
    • Replies: 9
    • Views: 10,244
    04-16-2008, 01:27 PM Go to last post
  52. Urgent: Linear Regression - Survey Design - Help needed

    Hi everyone, For my master thesis, I am trying to prepare a survey on key success factors for virtual worlds. I want to do a linear regression...

    Started by Lisaly2345‎, 04-10-2008 10:28 AM
    • Replies: 5
    • Views: 2,919
    04-16-2008, 03:28 AM Go to last post
  53. Question Can "infinite" values be used in regression?

    Hello, I am analyzing a series of plots along a recovery gradient, using "time since disturbance" as a continuous variable. I want to see how...

    Started by GiganD‎, 04-03-2008 03:21 PM
    • Replies: 4
    • Views: 2,907
    04-07-2008, 01:50 PM Go to last post
  54. Help with analysis. PLEASE.

    Hi all:wave: , please can any one give an indication of which stats test to use. So far I've looked at doing a bivariate and found significant data,...

    Started by georgemac‎, 03-29-2008 07:55 PM
    • Replies: 7
    • Views: 2,139
    03-30-2008, 03:28 PM Go to last post
  55. Spearmans test...?!

    Im conducting a project and it is based on radiographs, basically i look at a radiograph and decide how difficult it is likely to be i have done this...

    Started by Rara‎, 03-29-2008 08:59 AM
    • Replies: 8
    • Views: 2,195
    03-29-2008, 01:29 PM Go to last post
  56. A question about bimodality.

    First question - if my Y variable has a bimodal distribution, is it at all possible to run a regression on this variable? Second - if my Y...

    Started by aquietplace‎, 03-29-2008 01:22 PM
    • Replies: 1
    • Views: 1,582
    03-29-2008, 01:24 PM Go to last post
  57. Help Stats :( Interactions and Homoscedasticity

    IF anyone could help with this right now would appreciate it so much - have tried looking it up anywhere and finding so many different...

    Started by janeduluth‎, 03-22-2008 02:39 PM
    • Replies: 1
    • Views: 3,352
    03-26-2008, 10:33 AM Go to last post
  58. Partial R squares

    Is there a way to generate partial r-squares (automatically) in multiple regression? Assume a Model Y=X1 X2 X3. GLM produces estimates of R square...

    Started by evm‎, 03-25-2008 12:06 PM
    • Replies: 3
    • Views: 6,907
    03-25-2008, 03:58 PM Go to last post
  59. Dummy Variables and Multiple Regression

    Hi, if someone could make this clear for me, would be much appreciated.. Is it possible to create a dummy variable for more than one outcome. ...

    Started by janeduluth‎, 03-20-2008 11:50 AM
    • Replies: 3
    • Views: 4,977
    03-20-2008, 03:09 PM Go to last post
  60. Another question re: correlation and regression

    I seem to be getting confused between correlation and regression a bit... I'm trying to identify the relationship between a series of X variables...

    Started by arikel‎, 03-19-2008 01:25 PM
    • Replies: 3
    • Views: 1,821
    03-20-2008, 11:38 AM Go to last post

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