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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. who can help me with multiple regression analysis???

    I've calc correlation coefficients between several variables. The results are very promissing, since showing high correlation. The multiple...

    Started by PEIM‎, 09-19-2005 04:29 PM
    • Replies: 1
    • Views: 3,474
    09-19-2005, 06:44 PM Go to last post
  2. confidence and prediction interval

    Let's say I have the following data: y: 19.695 77.310 138.938 16.382 36.249 111.078 9.497 61.270 42.804 52.931 x: 4.0860 8.6203 11.6592 3.6581...

    Started by macro90‎, 10-20-2005 02:58 AM
    • Replies: 1
    • Views: 9,847
    10-20-2005, 08:13 AM Go to last post
  3. Another question about regression

    First, thank you to John and Quark for responding to my question about multiple regression!!!! I have another question. I am using SPSS and...

    Started by Diane‎, 11-20-2005 12:17 PM
    • Replies: 1
    • Views: 3,789
    11-20-2005, 12:25 PM Go to last post
  4. Regression vs ANOVA

    How would you determine whether to use ANOVA or multiple regression? What about the data or the situation of a research topic would be the deciding...

    Started by Diane‎, 11-25-2005 07:48 PM
    • Replies: 1
    • Views: 18,496
    11-25-2005, 08:41 PM Go to last post
  5. need help with regression problem asap!

    I have to do this problem but I have no idea how to interpret the data! Can somebody pleeeeeeeeeease help me?:wave: An object is thrown upward from...

    Started by pinkmari23‎, 12-06-2005 05:14 PM
    • Replies: 6
    • Views: 3,800
    12-13-2005, 12:26 PM Go to last post
  6. 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: 2,972
    02-08-2006, 09:07 AM Go to last post
  7. Multiple regression vs partial correlation

    I have another question. I have only 40 patients and 5 domains (or factors) made of 16 (questionnaire) items. In order to get correlation...

    Started by Susanbwh‎, 02-14-2006 09:06 AM
    • Replies: 1
    • Views: 7,021
    02-14-2006, 09:27 AM Go to last post
  8. Data pooling and regression analysis

    Dear All I have a question about data pooling and regression analysis, i have tried to read some basic statistic book, but still not answering my...

    Started by mchoud‎, 02-21-2006 10:48 AM
    • Replies: 4
    • Views: 5,525
    02-21-2006, 12:15 PM Go to last post
  9. Multiple Regression Question

    Hello, I have a question about multiple regression. My project involves non-political group involvement predicting political participation. My...

    Started by nadia‎, 02-20-2006 07:17 PM
    • Replies: 5
    • Views: 4,216
    02-21-2006, 08:37 PM Go to last post
  10. Improving an estimate of a mean value

    Hello, I have a dataset that has 10 independent descriptors and one dependent statistic, b. Only a few of the descriptors are quantitative and...

    Started by FailedStats101‎, 02-28-2006 08:19 AM
    • Replies: 3
    • Views: 3,298
    02-28-2006, 11:35 PM Go to last post
  11. Question Need help on deciding the analysis tests

    Hello every one, I am doing research in social science. i have following issue for which I need advise: 1. My sample is a snowball sample and...

    Started by amjadyunus‎, 03-09-2006 03:44 PM
    • Replies: 3
    • Views: 3,005
    03-16-2006, 08:43 AM Go to last post
  12. 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: 2,830
    04-01-2006, 05:52 PM Go to last post
  13. Multiple regression?

    Hi, I'm wondering if it is a bad violation to try to conduct a multiple regression analysis if some of the variables are non-parametric? My...

    Started by Mimi Le Rue‎, 04-11-2006 11:00 AM
    • Replies: 4
    • Views: 4,198
    04-13-2006, 09:59 AM Go to last post
  14. Need help with regression statistics analysis

    Hello I need serious help. I did my last project fine. I've followed all my instructions for this final project, and did everything, but the part to...

    Started by HeavenSoldier‎, 04-04-2006 01:46 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 7,702
    04-19-2006, 10:20 PM Go to last post
  15. MLR: R2 and RMSE in assessing quality

    How would one judge the quality of a multiple linear regression model if the model had a high value for cross-validated R2 but also a high value for...

    Started by Grateful‎, 04-26-2006 06:35 PM
    • Replies: 1
    • Views: 6,271
    04-26-2006, 08:00 PM Go to last post
  16. 2SLS - endogeneity issue

    I am running a regression on the relationship between aid inflows and investment levels in developing countries. One obvious other explanatory...

    Started by Alex E‎, 05-01-2006 09:37 AM
    • Replies: 1
    • Views: 3,632
    05-06-2006, 01:40 PM Go to last post
  17. Unsure of which test to use!

    If I want to assess the effects of a number of different factors such as sex, income etc on exam results which statistical test should I use? I have...

    Started by jagsman‎, 05-04-2006 08:01 PM
    • Replies: 4
    • Views: 2,624
    05-06-2006, 01:42 PM Go to last post
  18. Pooling data for multiple regression

    Hi All, :wave: I have a few issues with some collected data. I have been collecting attitude/perception questionaires using likert scales...

    Started by funkymunky‎, 05-12-2006 01:13 PM
    • Replies: 2
    • Views: 6,496
    05-13-2006, 08:43 AM Go to last post
  19. 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: 4,018
    05-20-2006, 11:44 AM Go to last post
  20. 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: 3,012
    06-05-2006, 06:29 PM Go to last post
  21. 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: 2,686
    06-11-2006, 07:41 PM Go to last post
  22. 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: 3,503
    08-06-2006, 12:25 PM Go to last post
  23. Question Linear Regression Equation

    Dear friends, I have a set of data as follows: 1....... 58.823.23 10....... 62.57.90 50....... 87.232.33 100....... 110.2910.33...

    Started by pavnesh‎, 07-27-2006 05:43 AM
    • Replies: 5
    • Views: 4,370
    08-11-2006, 12:24 AM Go to last post
  24. 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: 4,020
    08-27-2006, 03:34 AM Go to last post
  25. My regression has me confused!

    Can someone help me explain this? I did a stepwise multiple regression using the three factors. In Step 3, it shows the Bs in the order I...

    Started by Mcnuggets‎, 08-27-2006 12:49 PM
    • Replies: 2
    • Views: 3,830
    08-29-2006, 09:22 AM Go to last post
  26. Question Multiple Regression - Interpreting t-stat

    Hi all, If the model fit is satisfactory (ie. R-squared value is sufficiently high), how should the t-stat be interpreted... my reading indicated...

    Started by big-b‎, 08-28-2006 12:22 AM
    • Replies: 1
    • Views: 106,554
    08-29-2006, 01:56 PM Go to last post
  27. Multiple regression help needed

    I am struggling with the concept of a forced entry linear multiple data regression. Could someone please explain what they are, why they are used,...

    Started by southerngirl920‎, 09-05-2006 04:03 PM
    • Replies: 1
    • Views: 6,420
    09-05-2006, 08:27 PM Go to last post
  28. Need help selecting statistical test

    I am working on my dissertation proposal and have run into a snag in the analyses section. I am trying to analyze data drawn from two time-points. ...

    Started by psychstudent‎, 09-28-2006 05:47 PM
    • Replies: 2
    • Views: 2,641
    09-29-2006, 02:27 PM Go to last post
  29. Multiple Regression Analysis

    Hi there, i would need some advice with regards to Multiple regression. Hopefully i have done the analysis in SPSS correctly. I would like to...

    Started by cookies8‎, 10-08-2006 04:08 AM
    • Replies: 1
    • Views: 3,693
    10-08-2006, 05:46 PM Go to last post
  30. 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: 7,860
    11-13-2006, 02:50 PM Go to last post
  31. 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: 4,390
    12-06-2006, 07:26 PM Go to last post
  32. 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: 6,990
    12-10-2006, 05:01 AM Go to last post
  33. How to develop a regression expression using factor scores?

    Hi, I have four factors for fourteen variables. I want to develop a regression expression for a dependent variable using the correlated variables....

    Started by aceprod51‎, 01-21-2007 03:22 PM
    • Replies: 1
    • Views: 4,286
    01-23-2007, 10:05 PM Go to last post
  34. 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: 2,991
    01-31-2007, 02:28 PM Go to last post
  35. Mutliple Regression with a known coefficient

    I'm performing multiple regression on a linear model with several independent variables to generate equations such as: W = aX + bY + cZ X = dW +...

    Started by lfalin‎, 02-05-2007 08:26 AM
    • Replies: 1
    • Views: 4,167
    02-05-2007, 05:27 PM Go to last post
  36. 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: 2,284
    04-17-2007, 09:23 AM Go to last post
  37. 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: 3,917
    04-23-2007, 12:20 AM Go to last post
  38. Regression Analysis Non linear estimation using squares

    Hi, I have used Gompertz model to estimate an equation. I have followed these two sites they explain it all. ...

    Started by vladinator‎, 04-30-2007 03:01 AM
    • Replies: 1
    • Views: 3,446
    04-30-2007, 09:01 PM Go to last post
  39. 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: 2,272
    05-15-2007, 06:00 PM Go to last post
  40. Interactions in regression analysis

    Is their anyone who knows how to identify interactions between independent variables in a regression analysis? How does one use the output...

    Started by firefly‎, 06-08-2007 08:30 AM
    • Replies: 5
    • Views: 5,192
    06-09-2007, 09:42 PM Go to last post
  41. Weightings Problem

    I have been given an EXCEL model and my assigned task is (only) to fix it for problems that I might call "unintended consequences" of the underlying...

    Started by deanalt‎, 07-16-2007 09:32 PM
    • Replies: 4
    • Views: 3,083
    07-19-2007, 02:33 PM Go to last post
  42. generalized least squares

    Hello. How can I modify least square linear regression method in order to fit a straight line to data with non gaussian error (such as Levy, Poisson...

    Started by skan‎, 07-29-2007 01:21 PM
    • Replies: 6
    • Views: 4,312
    08-02-2007, 05:53 AM Go to last post
  43. Multicollinearity

    Hello at everyone, I'm new at the site, and I'd appreciate your suggestions. I have a multiple -through the origin- regression model. Working with...

    Started by hernan‎, 08-24-2007 06:13 PM
    • Replies: 2
    • Views: 7,051
    08-24-2007, 06:49 PM Go to last post
  44. Significance Issue in Regression

    Hi everyone! I have a statistical question that I hope someone can answer. I am doing a research about relationship between satisfaction and...

    Started by Mikica‎, 08-26-2007 07:14 AM
    • Replies: 9
    • Views: 4,016
    08-29-2007, 03:17 PM Go to last post
  45. 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: 2,994
    10-19-2007, 11:34 AM Go to last post
  46. 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: 3,731
    10-29-2007, 03:40 PM Go to last post
  47. 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: 5,411
    11-05-2007, 09:44 AM Go to last post
  48. Exclamation Regression & Predictions

    I have a problem to work out involving forecasting/predicting: Given multiple data sets (variables), I need to evaluate which set is the best...

    Started by corrinebean‎, 11-25-2007 07:15 PM
    • Replies: 1
    • Views: 3,083
    11-26-2007, 04:10 AM Go to last post
  49. 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: 2,966
    11-29-2007, 11:26 AM Go to last post
  50. Need your help with AIC and model selection

    Hello. If someone could help me with this problem, I would really appreciate it!! I am working on multiple Mantel tests (like multiple regression)....

    Started by fsms‎, 12-05-2007 03:56 AM
    • Replies: 1
    • Views: 3,093
    12-06-2007, 02:14 PM Go to last post
  51. Red face Combining Regressions

    Hi, I have several different regressions for various sites within an area estimating Y from X. I would like to combine all these sites in to...

    Started by danboyk‎, 12-19-2007 10:01 AM
    • Replies: 3
    • Views: 7,927
    12-28-2007, 11:31 AM Go to last post
  52. What's a logistic regression?

    Hello, in college we learned multiple regression techniques (different models: linear, log-lin, lin-log, exponential, ...) - including all the...

    Started by Analytics‎, 12-24-2007 05:34 PM
    • Replies: 4
    • Views: 6,031
    12-30-2007, 05:45 PM Go to last post
  53. Mallow's Cp Statistic as criterion for regression

    I am building a multiple regression model using stepwise procedures and using the minimum Mallow's CP statistic as criterion for adding variables to...

    Started by johng16‎, 09-20-2006 08:14 PM
    • Replies: 2
    • Views: 26,745
    01-07-2008, 06:58 AM Go to last post
  54. 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: 4,295
    01-11-2008, 08:14 PM Go to last post
  55. 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: 2,730
    01-11-2008, 10:34 PM Go to last post
  56. learning logistic regression

    If you're really good at multiple linear/non-linear regression analysis, would it be hard to learn how to do a logistic regression? Is that a lot...

    Started by Analytics‎, 01-20-2008 10:50 PM
    • Replies: 1
    • Views: 2,458
    01-21-2008, 03:12 AM Go to last post
  57. Multiple regression analysis

    Hi I was wondering if anyone can help me regarding multiple regression analysis. I have used the Stats program Minitab to analyse a large amount of...

    Started by Deanne‎, 02-03-2008 12:13 AM
    • Replies: 1
    • Views: 2,918
    02-04-2008, 03:26 PM Go to last post
  58. 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: 6,334
    02-04-2008, 05:48 PM Go to last post
  59. 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: 2,348
    02-09-2008, 12:25 PM Go to last post
  60. Chi vs R for goodness of fit

    As an undergraduate, I had a physics professor who strongly preferred chi^2 as a measure of a good curve-fit as opposed to correlation coefficient r....

    Started by MALDATA‎, 02-12-2008 01:00 PM
    • Replies: 1
    • Views: 2,882
    02-16-2008, 05:10 PM Go to last post

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