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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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: 2,675
    01-12-2009, 05:06 PM Go to last post
  2. Statistical Significance

    I am completing a statistics project having been given data for 30 years. I have calculated the pairwise correlation coefficients between Infant...

    Started by shanny9‎, 01-04-2009 07:22 AM
    • Replies: 2
    • Views: 3,284
    01-04-2009, 03:42 PM Go to last post
  3. Unhappy multiple regression analysis on likertscale

    Dear All, I am doing the analysis of my data obtained through a questionaire. i want to find the relationship of different forms justice...

    Started by Mobushir riaz Khan‎, 12-22-2008 10:18 AM
    • Replies: 1
    • Views: 2,427
    12-24-2008, 07:46 AM Go to last post
  4. Linear regression

    Hi all I was given a data sample of 35 countries which included the country name,the number of railways and the number of airports in the given...

    Started by gloew‎, 12-19-2008 04:44 AM
    • Replies: 6
    • Views: 3,034
    12-23-2008, 06:09 PM Go to last post
  5. Multiple logistic Regression Power Analysis

    Hi to everybody, Please does anybody can help me to solve this problem? I have a multiple logistic regression model with more than one BINARY...

    Started by Canyon75‎, 12-20-2008 08:05 AM
    • Replies: 1
    • Views: 4,884
    12-22-2008, 09:04 AM Go to last post
  6. Hlm?

    I am working with a large data set, n = 1200+ average course grades culled from over 15,000 students from a school. I ran a regression using average...

    Started by ewblack‎, 12-09-2008 01:23 PM
    • Replies: 9
    • Views: 4,866
    12-17-2008, 12:21 PM Go to last post
  7. Binary Logistic Regression in R

    Warning: this is going to be a long post. Acknowledgement: Thanks to The Ecologist for getting me started on what I hope is the right road. This...

    Started by jerh‎, 12-04-2008 11:10 AM
    2 Pages
    1 2
    • Replies: 24
    • Views: 23,110
    12-16-2008, 03:21 AM Go to last post
  8. adjusting a proportion score (controling for age)

    I have 20 yes/no ratings (did this product help you). People were able to rate as many of the 20 products as they used (on average people rated 5...

    Started by chinaplate‎, 12-15-2008 10:19 PM
    • Replies: 8
    • Views: 4,361
    12-15-2008, 11:23 PM Go to last post
  9. ANOVA confusions- Please Help

    Hello, I was wondering if you could please offer any advice as I appear to have got rather muddled. I am writing a resesarch proposal, and I...

    Started by GuineaPig‎, 12-09-2008 03:35 PM
    • Replies: 8
    • Views: 2,889
    12-10-2008, 11:14 PM Go to last post
  10. Can you guys check these for me

    Shade answers to T/F questions and type letter answer to multiple choice questions next to problem number. Chapters 13 & 14 included. T F 1. If a...

    Started by Bicano‎, 12-08-2008 11:07 AM
    • Replies: 1
    • Views: 5,675
    12-08-2008, 03:33 PM Go to last post
  11. Question Multiple Regression & Multiple Linear Regression: 2 Qu's

    I know these are 2 very basic question, but if someone could please confirm them for me I'd be very grateful indeed: 1. Am I correct in thinking...

    Started by gemma7‎, 08-31-2008 08:49 AM
    • Replies: 4
    • Views: 13,309
    12-05-2008, 03:40 PM Go to last post
  12. price determination prediction

    Its been 2 years since my last statistics class. I did fairly well but the material isn't so fresh since I haven't had to use it. I am writting a...

    Started by mikeo1313‎, 12-01-2008 02:56 AM
    • Replies: 1
    • Views: 2,297
    12-01-2008, 03:14 AM Go to last post
  13. 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: 21,364
    11-30-2008, 09:08 PM Go to last post
  14. 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: 25,938
    11-29-2008, 11:29 AM Go to last post
  15. 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: 3,026
    11-26-2008, 08:13 PM Go to last post
  16. 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: 5,623
    11-26-2008, 06:58 PM Go to last post
  17. 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: 13,588
    11-19-2008, 10:17 AM Go to last post
  18. 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: 5,041
    11-18-2008, 03:32 PM Go to last post
  19. 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: 2,195
    11-16-2008, 06:04 AM Go to last post
  20. 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: 2,630
    11-13-2008, 07:26 PM Go to last post
  21. 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: 18,950
    11-11-2008, 04:53 AM Go to last post
  22. 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: 23,358
    11-11-2008, 12:04 AM Go to last post
  23. 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: 16,302
    11-06-2008, 02:26 PM Go to last post
  24. 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: 2,936
    11-05-2008, 04:41 PM Go to last post
  25. 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: 2,458
    10-21-2008, 02:40 PM Go to last post
  26. 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: 11,460
    10-20-2008, 04:47 AM Go to last post
  27. 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: 2,163
    10-16-2008, 07:49 AM Go to last post
  28. 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: 2,380
    10-14-2008, 10:05 PM Go to last post
  29. 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: 2,790
    10-10-2008, 01:23 AM Go to last post
  30. 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: 6,291
    09-30-2008, 10:27 AM Go to last post
  31. 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: 2,261
    09-22-2008, 06:06 PM Go to last post
  32. 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: 2,318
    09-22-2008, 09:15 AM Go to last post
  33. 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: 2,033
    09-20-2008, 12:25 PM Go to last post
  34. 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: 2,295
    09-19-2008, 12:11 PM Go to last post
  35. 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: 2,776
    09-16-2008, 03:10 AM Go to last post
  36. 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: 9,279
    09-06-2008, 01:01 AM Go to last post
  37. 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: 3,375
    09-03-2008, 06:48 AM Go to last post
  38. 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: 4,358
    09-02-2008, 03:51 PM Go to last post
  39. 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: 2,998
    09-01-2008, 08:25 AM Go to last post
  40. 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: 3,017
    08-28-2008, 05:05 AM Go to last post
  41. 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: 5,465
    08-18-2008, 04:38 AM Go to last post
  42. 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: 6,870
    08-17-2008, 12:49 PM Go to last post
  43. 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: 3,727
    08-16-2008, 12:43 PM Go to last post
  44. 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: 5,758
    08-13-2008, 08:05 PM Go to last post
  45. 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: 2,644
    08-12-2008, 02:41 PM Go to last post
  46. 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: 2,601
    08-06-2008, 03:39 AM Go to last post
  47. 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: 17,418
    08-02-2008, 10:34 PM Go to last post
  48. 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: 4,408
    07-30-2008, 01:23 PM Go to last post
  49. 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: 2,962
    07-13-2008, 07:25 PM Go to last post
  50. 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: 10,890
    07-05-2008, 04:58 PM Go to last post
  51. 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: 22,913
    06-27-2008, 09:27 AM Go to last post
  52. 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: 25,099
    06-23-2008, 03:28 PM Go to last post
  53. 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: 4,313
    06-12-2008, 05:56 PM Go to last post
  54. 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: 2,503
    06-12-2008, 05:19 PM Go to last post
  55. 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: 3,884
    06-12-2008, 07:07 AM Go to last post
  56. 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: 2,586
    05-29-2008, 07:57 PM Go to last post
  57. 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: 12,588
    05-29-2008, 09:33 AM Go to last post
  58. 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: 4,052
    05-29-2008, 08:32 AM Go to last post
  59. 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: 3,354
    05-27-2008, 08:36 AM Go to last post
  60. 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: 3,046
    05-25-2008, 09:07 AM Go to last post

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