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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. F-Test Interpretation and Log-Linear?

    Hey. I have found this a very difficult subject to self-teach and unfortunately I have not found my teachers particularly helpful. Sorry about the...

    Started by Jak‎, 04-16-2012 02:10 PM
    • Replies: 9
    • Views: 4,248
    04-27-2012, 01:40 PM Go to last post
  2. f-test, regression to polynomial

    Hi, I am in over my head and could use some guidance. For an assignment, I have divided the data into two classes (arbitrary) and used only one to...

    Started by JillthePill‎, 10-13-2012 06:27 PM
    • Replies: 0
    • Views: 1,538
    10-13-2012, 06:27 PM Go to last post
  3. Factor Analysis

    I ran the factor analysis, but I want to make sure I have the groupings right. I am attaching my analysis and the rotated component matrix has...

    Started by drdokter‎, 11-13-2010 09:31 AM
    • Replies: 1
    • Views: 2,324
    11-13-2010, 02:15 PM Go to last post
  4. Factor Analysis needed given low multicollinearity

    Hej! I carried out a multiple regression analysis and am now wondering if I need to do a factor analysis. Is my assumption correct that it is...

    Started by Johannes‎, 05-09-2014 09:50 AM
    • Replies: 0
    • Views: 1,069
    05-09-2014, 09:50 AM Go to last post
  5. Factor analysis vs logistic regression

    Factor analysis and logistic regression are methods which i have never used before. I really did not need to use them, well until now. My knowledge...

    Started by badibad‎, 10-02-2013 12:53 PM
    • Replies: 2
    • Views: 3,695
    10-03-2013, 02:24 PM Go to last post
  6. 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: 16,254
    11-06-2008, 02:26 PM Go to last post
  7. Factor in binary logistic regression?

    Hi, I am currently performing a binary logistic regression, with a number of predictors. The aim is to measure the relationship between the...

    Started by blastStu‎, 04-10-2011 06:07 AM
    • Replies: 1
    • Views: 3,210
    04-13-2011, 02:47 AM Go to last post
  8. Question Factor scores as independent variables in multiple regression

    I'm checking that I have understood this right. Factor scores must be achieved via oblique rotation, because factor scores must be allowed to...

    Started by zxc‎, 04-19-2016 11:25 AM
    • Replies: 0
    • Views: 777
    04-19-2016, 11:25 AM Go to last post
  9. Factor scores or mean values?

    Dear all, I hope I am in the correct forum and you can help me. At the moment I pursue a survey study. In the survey I obtain items that shall...

    Started by Ute1985‎, 11-05-2015 05:42 AM
    • Replies: 0
    • Views: 825
    11-05-2015, 05:42 AM Go to last post
  10. Factorial ANOVA

    I am not sure if what i am about to ask would make complete sense so let me start from the beginning. I'm doing research to measure five different...

    Started by jaanus_lallu‎, 07-11-2009 06:11 PM
    • Replies: 2
    • Views: 3,021
    07-15-2009, 06:49 AM Go to last post
  11. Factorial design and regression

    Hi All, I need some support on a regression needed for a factorial design. For sake of clarity I have to tell I am a dummy on statistical topic,...

    Started by Rosario Martorana‎, 06-23-2011 03:20 AM
    • Replies: 0
    • Views: 2,614
    06-23-2011, 03:20 AM Go to last post
  12. Fama MacBeth regression + different fiscal year end

    dear all, t's z 1st time that i make research and i'm new to state so i had several questions, can i apply fama macbeth regression for a short time...

    Started by gihan‎, 10-21-2012 12:48 PM
    • Replies: 0
    • Views: 2,474
    10-21-2012, 12:48 PM Go to last post
  13. Lightbulb Fama-Macbeth cross-sectional regression interpretation

    Hello everyone, I have applied Fama-Macbeth cross-sectional regression on Fama and French five-factor model (2014). On the left-hand side are the...

    Started by Subhan Ahmad‎, 08-17-2016 12:59 PM
    asset pricing model, fama macbeth regression, regression coefficent
    • Replies: 0
    • Views: 1,589
    08-17-2016, 12:59 PM Go to last post
  14. Feedback Questions (Robust)

    Dear all, Have recently had some high level feedback on a regression study. "How robust is your empirical results? I would like to see some...

    Started by richieboy‎, 10-05-2014 04:34 AM
    • Replies: 1
    • Views: 1,518
    10-05-2014, 05:31 AM Go to last post
  15. Field's test for linearity of the logit

    Hello, I am currently working on my bachelor thesis and I ran a logistic regression on a data set I have. From Field's 'Discovery Statistics...

    Started by abced‎, 05-17-2016 07:19 AM
    • Replies: 0
    • Views: 1,618
    05-17-2016, 07:19 AM Go to last post
  16. Fill in multiple missing values given correlation matrix

    I have a correlation matrix: mat <- round(cor(mtcars), 2) mpg cyl disp hp drat wt qsec vs am gear carb mpg 1.00...

    Started by trinker‎, 04-26-2016 09:51 AM
    2 Pages
    1 2
    • Replies: 16
    • Views: 3,826
    05-01-2016, 09:39 PM Go to last post
  17. Find costant that satisfies the variance

    Hi, I have this regression model : Y_i=B_1+B_2logx_i+2e_i e_i~N(0,σ2) I am asked to find the constant :

    Started by valentina89‎, 06-24-2016 03:02 AM
    regresion, variance
    • Replies: 0
    • Views: 958
    06-24-2016, 03:02 AM Go to last post
  18. Find expected value and variance of ARMA(1,1) model

    My apologies if this isn't the correct subforum to ask this question. Here's the model: y_{t}=50+ 0.8y_{t-1} + a_{t} - 0.2a_{t-1} How do I...

    Started by downthesun01‎, 04-25-2011 06:13 PM
    • Replies: 3
    • Views: 13,128
    04-27-2011, 02:11 AM Go to last post
  19. Find standard error of mean

    Suppose you have a process x_{t} = \mu +w_{t} -0.8*w_{t-1} where w_{t} ~ wn(0,\sigma_{w}^2). How do I calculate the standard error of var(\bar{x})...

    Started by lord12‎, 01-16-2013 05:52 PM
    • Replies: 4
    • Views: 1,641
    01-24-2013, 07:47 PM Go to last post
  20. Find the affect of introducing a variable into a Data Set

    Good morning, Everyone! I apologize, but I must admit that it's been a few years since I've been engaged in any statistical analysis; that being...

    Started by sapiensgladio‎, 07-11-2011 01:37 PM
    conversion, regression
    • Replies: 3
    • Views: 3,069
    07-11-2011, 08:21 PM Go to last post
  21. Find the Most Important Variables In Predictive Models

    Hi, I have a target variable Y, and twenty predictors (input variables) X1,X2,...,X20. I can predict Y by its predictors X1,X2,...,X20....

    Started by mojassameh‎, 06-02-2015 06:56 AM
    • Replies: 1
    • Views: 1,132
    06-02-2015, 07:16 AM Go to last post
  22. Find the regression equation

    Hi I have problem and I want you to help me This problem should use by Minitab.... In a study in collaboration with the Engineering...

    Started by evian‎, 05-28-2012 01:52 AM
    • Replies: 5
    • Views: 2,639
    05-28-2012, 08:06 AM Go to last post
  23. Post Find the regression line?

    Using test runs with the same automobile on a test track the following data on speed (km/hr) and mileage (km/l) were obtained. Speed (x): 48 48 64...

    Started by ani223‎, 04-10-2013 07:31 AM
    • Replies: 2
    • Views: 2,508
    04-14-2013, 10:19 PM Go to last post
  24. find variance of prediction errors for an AR(2) process

    Hi I have attached my question due to my lack of familiarity with latex at the moment. I need to find the variance of the prediction errors,...

    Started by cjones‎, 05-11-2012 05:58 PM
    • Replies: 0
    • Views: 4,491
    05-11-2012, 05:58 PM Go to last post
  25. Finding a patch in a series.

    Hello! I wonder if anybody can help me. I am working on a personal project and I want to find the best match for a patch in a larger series. I...

    Started by yaraeovento‎, 01-15-2015 01:11 AM
    cross correlation, matching data
    • Replies: 0
    • Views: 1,140
    01-15-2015, 01:11 AM Go to last post
  26. Finding complex relationships with multiple independent variables

    Howdy. Question - how can I find complex relationships when there are multiple independent variables. Specifically, I am looking at a situation where...

    Started by dwl‎, 07-25-2012 09:29 AM
    • Replies: 1
    • Views: 2,078
    07-25-2012, 10:45 AM Go to last post
  27. Finding correlation of independent variables with a response variable in R

    I have a set of independent variables X1, X2, X3,..., Xn and a response variable Y. I want to perform some form of data analysis in R so that I only...

    Started by osmankhalid2005‎, 07-26-2014 08:00 PM
    correlation analysis, multi linear regression
    • Replies: 3
    • Views: 1,994
    07-27-2014, 06:23 AM Go to last post
  28. Finding Least Square Estimates

    Hi, Given Y_i=\beta+\beta x_i^2 +\epsilon_i , I want to find the least squares estimate of \beta . I know I need to minimize ...

    Started by S-C-3-1-3‎, 01-23-2014 07:33 PM
    • Replies: 3
    • Views: 1,185
    01-24-2014, 04:05 AM Go to last post
  29. Finding predicted values with logged (ln) dependent variable.

    Hello all, I'm currently working on my first quantitative project. I am doing an OLS regression in SPSS. I had to take the natural log of my DV in...

    Started by burdfishdemon‎, 07-27-2016 03:21 AM
    log transformation, ols, predicted values, spss, statistics
    • Replies: 4
    • Views: 3,715
    01-23-2017, 11:16 AM Go to last post
  30. Finding R^2 when you know the trend

    I'm working on making NBA player projections for fantasy basketball. Right know I have my projections and I'm looking at the correlations for each...

    Started by mattdh12‎, 03-21-2014 08:52 AM
    • Replies: 0
    • Views: 1,387
    03-21-2014, 08:52 AM Go to last post
  31. Finding Significant Difference between Linear Regressions

    Hello. I have a scatterplot with two different sets of data plotted. Each individual set has its own linear regression formula and R-squared...

    Started by danhageman‎, 07-16-2015 11:31 PM
    outlier detection, p-value, regression analysis, scatter plot, significance
    • Replies: 0
    • Views: 1,013
    07-16-2015, 11:31 PM Go to last post
  32. Exclamation Finding standard error for elasticity (log-log model)

    Hi guys, Can anyone help with this? In(sub) = 3.43 - 0.899 In(Price) + 0.374 In(Age) + 0.141 In(Age)In(Price) + 0.229 In(Characters) The...

    Started by cuteylion‎, 11-08-2010 04:04 AM
    • Replies: 0
    • Views: 4,897
    11-08-2010, 04:04 AM Go to last post
  33. finding the autocovariance function for exp(x)

    I want to find the autocovariance function of y(t) = exp(x(t) which is a nonlinear time series. When I try to find the autocovariance function I...

    Started by lord12‎, 01-16-2013 10:32 AM
    • Replies: 4
    • Views: 2,614
    01-16-2013, 05:44 PM Go to last post
  34. Finding the population mean from a sample

    For a quiz, the question I was given is "Estimate the mean weekly gross sales for all stores that spend $800 on direct mail advertising (Independent...

    Started by Thebluesclues‎, 03-31-2015 01:46 AM
    • Replies: 1
    • Views: 2,971
    03-31-2015, 08:12 AM Go to last post
  35. Firm Fixed Effects

    In some regressions the the authors control for “firm fixed effects”. What does that mean? What are Firm fixed effects specifically? Are they just...

    Started by JelleJansen‎, 12-14-2011 09:26 AM
    • Replies: 4
    • Views: 11,639
    12-15-2011, 08:22 AM Go to last post
  36. Thumbs up First difference regression - how to interpret coefficients?

    Hi there, I am planning to apply first difference regression in order to account for time (2 time points). I was wondering what will be the...

    Started by SylviaS‎, 08-21-2013 01:28 PM
    • Replies: 3
    • Views: 13,562
    08-21-2013, 03:38 PM Go to last post
  37. First differences

    Hi, I am trying to find a mathmetical relationship between the economic growth, poulation and the number of cars in a specific area where the no....

    Started by rajaa1510‎, 10-08-2012 11:26 AM
    • Replies: 2
    • Views: 1,320
    10-09-2012, 02:11 PM Go to last post
  38. first set of timeseries data to predict second set

    I posted this on another site about a month ago but got no responses, so I thought I'd post in this forum. I have timeseries data with n=100 and...

    Started by eggman2001‎, 01-26-2013 05:27 PM
    regression analysis
    • Replies: 1
    • Views: 823
    01-30-2013, 08:06 PM Go to last post
  39. Firth regression and AIC-based model selection

    Dear all, when using Firth's bias reduction method (Firth 1993) to fit logistic regressions, is it possible (sensible) to compare models using AIC? ...

    Started by Luke‎, 09-01-2017 08:04 AM
    aic, firth regression
    • Replies: 4
    • Views: 342
    09-01-2017, 03:41 PM Go to last post
  40. Fisher r to z transform / significance test for two different values of r^2

    Short version: I have two values of r^2 from Pearson's correlation, one from a control group (.713) and one for an experimental (.527), and I would...

    Started by biosciguy‎, 04-01-2015 01:11 AM
    correlation coefficient, fisher's z-transformed, r language, r-squared
    • Replies: 1
    • Views: 2,371
    04-01-2015, 08:10 AM Go to last post
  41. Fishing with data: Use of multiple regressions on the same data set

    I have approached this issue, running multiple models with the same data set usually in the context of FW error . It is the habit of running multiple...

    Started by noetsi‎, 03-14-2016 11:31 AM
    • Replies: 2
    • Views: 1,466
    03-14-2016, 01:25 PM Go to last post
  42. Fit a non-recatngular parabola in R

    Hello, I'd like to fit the formula below to a non-rectangular parabola in R. C = (XI+A-√((ϕI+A )^2-4XϕIA))/2X-R I have several data points...

    Started by nofunsally‎, 09-08-2011 10:01 PM
    hyperbola, non-linear, non-rectangular, parabola
    • Replies: 0
    • Views: 4,286
    09-08-2011, 10:01 PM Go to last post
  43. fit an ARIMA-model with t -distributed innovation terms

    Hello, I have to fit an ARIMA-model with t -distributed innovation terms (skew-t) with software R. If I use arima function (package "stats") I...

    Started by cristal‎, 01-22-2016 10:41 AM
    • Replies: 0
    • Views: 831
    01-22-2016, 10:41 AM Go to last post
  44. Fit Gompertz with vector of dependent variables.

    Hi community, Do any of you know where or how I could fit a to a Gompertz? Usually, we just fit some variable vs time to a Gompertz like number...

    Started by bjbreitling‎, 12-03-2012 03:22 PM
    • Replies: 0
    • Views: 1,670
    12-03-2012, 03:22 PM Go to last post
  45. Fitting 3 mixed-effects models with different outcome variables

    Hi all The overarching dependent variable in my study is mental processing. Since this is a hard-to-grasp construct, I've used three measurements...

    Started by lucnv‎, 12-11-2013 06:57 AM
    different dvs, mixed-effects
    • Replies: 0
    • Views: 1,387
    12-11-2013, 06:57 AM Go to last post
  46. Fitting a model with Bernoulli/Binomially distributed data

    I am used to fitting data to estimate parameters in a model f(x,A) where x is my data point and A is the parameter(s) to be determined. To achieve...

    Started by sparticle10‎, 01-07-2012 08:36 PM
    bernoulli, maximum likehood, regresion
    • Replies: 6
    • Views: 2,695
    01-08-2012, 02:44 PM Go to last post
  47. Fitting confidence interval lines in R using the predict function

    Hi everyone, I am currently attempting to fit confidence interval lines to a regression model in R, but every time I try to for example add a +2...

    Started by rd123‎, 02-17-2013 05:33 AM
    confidence interval, predict function, r code help, r coding, r confidence intervals
    • Replies: 0
    • Views: 2,414
    02-17-2013, 05:33 AM Go to last post
  48. Question Fitting curves to dimensionless data sets

    I have a number of data sets that I have made non-dimensional across both the x and y axis, such that they range from 0 to 1. I want to fit curves...

    Started by yccmp‎, 12-16-2014 02:39 AM
    • Replies: 0
    • Views: 1,528
    12-16-2014, 02:39 AM Go to last post
  49. Fitting data with Cauchy-noise

    Not sure if this is the right board to post this on, but perhaps someone can help me. I've got two sets of data that can be modeled as something...

    Started by gct‎, 08-09-2011 10:30 AM
    • Replies: 0
    • Views: 1,642
    08-09-2011, 10:30 AM Go to last post
  50. Fitting my predictions to linear model

    I always have X values and sometimes Y values. I plot them and get R squared ~0.9. Then I use plot equation to calculate more Y values...

    Started by Vytautas‎, 05-12-2014 07:29 AM
    • Replies: 0
    • Views: 1,022
    05-12-2014, 07:29 AM Go to last post
  51. Fitting of a linea mixed model

    Hello I'm trying to modelize the diving depth of birds according to categorical (sex, age class: adults/subadults) and conitnuous parameters...

    Started by Alex939‎, 09-26-2013 05:00 PM
    • Replies: 8
    • Views: 2,147
    09-27-2013, 08:36 AM Go to last post
  52. Fitting Regression Lines to Data

    I'm trying classify how much certain stock/stock prices trend, by using the slope of the regression line based on the price movements. However, I'm...

    Started by jojo400‎, 01-28-2012 08:55 PM
    • Replies: 1
    • Views: 2,105
    01-30-2012, 08:09 AM Go to last post
  53. Fixed effect Model

    dear all, I am having problems with the fixed effect model. In a nutshell, I am analysing the impact of disasters within families with regard...

    Started by Heike C.‎, 08-22-2015 08:08 AM
    • Replies: 0
    • Views: 1,217
    08-22-2015, 08:08 AM Go to last post
  54. Fixed effects (FE) vs. Generalized Equations Estimation (GEE)

    Friends, let me quickly give you the context of my question first: I am analyzing an unbalanced panel of 200 companies across 4 years. My research...

    Started by viper430‎, 06-21-2012 05:25 PM
    • Replies: 1
    • Views: 4,946
    06-25-2012, 04:50 PM Go to last post
  55. Fixed effects / clustered standard error in multi-level data

    Hi everyone :) I'm analyzing the effect of political corruption on the bid-ask spread of US political entities, namely my data set consists of...

    Started by Physiokrat‎, 09-25-2017 08:22 AM
    • Replies: 0
    • Views: 122
    09-25-2017, 08:22 AM Go to last post
  56. Fixed Effects and interaction terms

    I am trying to analyze sex difference in housework time using longitudinal data with Fixed Effects. Since, sex is time-invariant I can not...

    Started by Laco‎, 03-01-2012 05:33 PM
    • Replies: 2
    • Views: 7,376
    03-01-2012, 06:01 PM Go to last post
  57. Fixed Effects Common Panel Regression versus GMM estimation

    Hi, I have estimated my model using the Fixed Effects Common Panel method and this seems to work fine. I get an R2 of .90 However, I am now in...

    Started by Herbert‎, 02-18-2011 07:43 AM
    common panel, fixed effects, gmm
    • Replies: 0
    • Views: 6,065
    02-18-2011, 07:43 AM Go to last post
  58. Fixed effects estimation: how many dummy variables can be included in model

    Dear community, For my Bachelor-Thesis I have to assess the link between a firm's connectedness and success. For this purpose I was given data...

    Started by Benni‎, 03-28-2014 03:41 PM
    • Replies: 1
    • Views: 1,590
    03-30-2014, 03:55 AM Go to last post
  59. Fixed effects model urgent help

    So I have a dataset which I am trying to use the fixed effects model on. I am confused if I am doing it correctly. I am using panel data to...

    Started by jdev10‎, 04-18-2017 11:02 PM
    • Replies: 0
    • Views: 528
    04-18-2017, 11:02 PM Go to last post
  60. Fixed Effects or Random Effects for finding determinants of expenditure

    Hi! I am doing a paper on the determinants of healthcare expenditure for the elderly. I have panel data for income and expenditure for a period of 10...

    Started by BNB‎, 12-10-2012 12:41 PM
    • Replies: 2
    • Views: 1,172
    02-06-2013, 05:59 AM Go to last post

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