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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...

• Replies: 9
• Views: 4,248
Jak
04-27-2012, 01:40 PM
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...

• Replies: 0
• Views: 1,538
10-13-2012, 06:27 PM
3. ### 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...

• Replies: 0
• Views: 1,069
05-09-2014, 09:50 AM
4. ### 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...

• Replies: 2
• Views: 3,695
10-03-2013, 02:24 PM
5. ### 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...

• Replies: 3
• Views: 16,254
11-06-2008, 02:26 PM
6. ### 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...

• Replies: 1
• Views: 3,210
04-13-2011, 02:47 AM
7. ### 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...

• Replies: 0
• Views: 777
zxc
04-19-2016, 11:25 AM
8. ### 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...

• Replies: 0
• Views: 825
11-05-2015, 05:42 AM
9. ### 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...

• Replies: 2
• Views: 3,021
07-15-2009, 06:49 AM
10. ### 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,...

• Replies: 0
• Views: 2,614
06-23-2011, 03:20 AM
11. ### 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...

• Replies: 0
• Views: 2,474
10-21-2012, 12:48 PM
12. ### 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...

• Replies: 0
• Views: 1,589
08-17-2016, 12:59 PM
13. ### 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...

• Replies: 1
• Views: 1,518
10-05-2014, 05:31 AM
14. ### 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...

• Replies: 0
• Views: 1,618
05-17-2016, 07:19 AM
15. ### 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...

• Replies: 16
• Views: 3,826
05-01-2016, 09:39 PM
16. ### 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 :

• Replies: 0
• Views: 958
06-24-2016, 03:02 AM
17. ### 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...

• Replies: 3
• Views: 13,128
04-27-2011, 02:11 AM
18. ### 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})...

• Replies: 4
• Views: 1,641
01-24-2013, 07:47 PM
19. ### 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...

• Replies: 3
• Views: 3,069
07-11-2011, 08:21 PM
20. ### 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....

• Replies: 1
• Views: 1,132
06-02-2015, 07:16 AM
21. ### 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...

• Replies: 5
• Views: 2,639
05-28-2012, 08:06 AM
22. ### 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...

• Replies: 2
• Views: 2,508
04-14-2013, 10:19 PM
23. ### 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...

• Replies: 0
• Views: 1,140
01-15-2015, 01:11 AM
24. ### 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...

• Replies: 1
• Views: 2,078
07-25-2012, 10:45 AM
25. ### 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...

• Replies: 3
• Views: 1,994
07-27-2014, 06:23 AM
26. ### 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 ...

• Replies: 3
• Views: 1,185
01-24-2014, 04:05 AM
27. ### 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...

• Replies: 4
• Views: 3,715
01-23-2017, 11:16 AM
28. ### 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...

• Replies: 0
• Views: 1,387
03-21-2014, 08:52 AM
29. ### 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...

• Replies: 0
• Views: 1,013
07-16-2015, 11:31 PM
30. ### 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...

• Replies: 0
• Views: 4,897
11-08-2010, 04:04 AM
31. ### 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...

• Replies: 4
• Views: 2,614
01-16-2013, 05:44 PM
32. ### 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...

• Replies: 4
• Views: 11,639
12-15-2011, 08:22 AM
33. ### 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...

• Replies: 3
• Views: 13,562
08-21-2013, 03:38 PM
34. ### 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....

• Replies: 2
• Views: 1,320
10-09-2012, 02:11 PM
35. ### 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...

• Replies: 1
• Views: 823
01-30-2013, 08:06 PM
36. ### 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? ...

• Replies: 4
• Views: 342
09-01-2017, 03:41 PM
37. ### 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...

• Replies: 1
• Views: 2,371
04-01-2015, 08:10 AM
38. ### 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...

• Replies: 2
• Views: 1,466
03-14-2016, 01:25 PM
39. ### 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...

• Replies: 0
• Views: 4,286
09-08-2011, 10:01 PM
40. ### 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...

• Replies: 0
• Views: 831
01-22-2016, 10:41 AM
41. ### 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...

• Replies: 0
• Views: 1,670
12-03-2012, 03:22 PM
42. ### 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...

• Replies: 0
• Views: 1,387
12-11-2013, 06:57 AM
43. ### 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...

• Replies: 6
• Views: 2,695
01-08-2012, 02:44 PM
44. ### 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...

• Replies: 0
• Views: 2,414
02-17-2013, 05:33 AM
45. ### 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...

• Replies: 0
• Views: 1,528
12-16-2014, 02:39 AM
46. ### 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...

• Replies: 0
• Views: 1,642
gct
08-09-2011, 10:30 AM
47. ### 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...

• Replies: 0
• Views: 1,022
05-12-2014, 07:29 AM
48. ### 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...

• Replies: 1
• Views: 4,946
06-25-2012, 04:50 PM
49. ### 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...

• Replies: 0
• Views: 122
09-25-2017, 08:22 AM
50. ### 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...

• Replies: 2
• Views: 7,376
03-01-2012, 06:01 PM
51. ### 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...

• Replies: 0
• Views: 6,065
02-18-2011, 07:43 AM
52. ### 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...

• Replies: 1
• Views: 1,590
03-30-2014, 03:55 AM
53. ### 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...

• Replies: 0
• Views: 528
04-18-2017, 11:02 PM
54. ### 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...

• Replies: 2
• Views: 1,172
02-06-2013, 05:59 AM

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