1. Announcement:
05-10-2017
Views:
1,892
Page 52 of 73 First ... 2 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 ... Last
Threads 3061 to 3120 of 4339

# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### (Beginner!) Questions about regression on CD album sales/internet use/digital music s

Hello, I am attempting to perform a regression on what has caused the reduction in CD album sales, and need a little assistance. I have 28 data...

• Replies: 1
• Views: 1,967
03-29-2012, 09:34 AM
2. ### Comparing curves fitted to two quadratic regressions

Hello, I have constructed two calibration curves, i.e. plotting known concentrations against response. Both of these sets of data seem to fit a...

• Replies: 2
• Views: 4,188
03-28-2012, 07:30 PM
3. ### Which regression should I use?????? HELP

I have a questionnaire with where respondents were asked if they remember seeing a TV commercial, a radio commercial and a magazine add. “Yes or no...

• Replies: 2
• Views: 2,207
03-28-2012, 04:20 PM
4. ### Heckman model

Hi, I'm running a heckman model however some issues have arisen: 1. The log likelihood function is not concave and does not converge after a...

• Replies: 0
• Views: 2,494
03-28-2012, 04:11 PM
5. ### a question about estimates in mixed models

Hello, I was hoping to be able to find all of the estimates of covariates and of the categories with a number of factors. I found a similar study...

• Replies: 0
• Views: 1,302
03-28-2012, 12:55 AM
6. ### Interaction effect: Do the single variables both need to be significant?

Dear all, If you have a regression model Y=b0+b1*A+b2*B+b3*A*B, and the dependent variable A and the interaction effect A*B have significant...

• Replies: 2
• Views: 2,141
03-26-2012, 06:22 PM
7. ### Determining weighting factors from linear regression

Hi, I am working on a digital filtering project where I am trying to optimize a filter for a Doppler ultrasound application. Without going in to...

• Replies: 0
• Views: 3,144
03-26-2012, 06:20 PM
8. ### Is my sample too big ?

Hello, I have a sample of 20 continuous variables, along with 3 explanatory (2 continuous and 1 dummy). I am trying to run a regression, linear...

• Replies: 3
• Views: 3,047
03-26-2012, 10:55 AM
9. ### Significant Effects after Including Interaction Variable (?) :confused:

Dear all, I hope you could help me with the following: I have tested two regression models, one with inependent variable A, B, C, D, E and one...

• Replies: 0
• Views: 1,415
MDT
03-26-2012, 08:57 AM
10. ### help appreciated with a validation exercise

Hello all, I would really appreciate your help with some statistical analysis (yukh! haha!) A psychometric test has been mapped onto a companies...

• Replies: 0
• Views: 1,105
03-26-2012, 06:27 AM
11. ### Regression with non- parametric data....

Hello! I have conducted the normality test Anderson-Darling on my data, and with a p value of <0,010, I guess that the data are not normal...

• Replies: 8
• Views: 5,614
03-26-2012, 03:42 AM
12. ### Where in the Regression Output tells me which are the strongest predictor variables?

Hi, I'm no statitician (yet), but I'm having a go!! - am looking to design an employee survey and analyse the data in Excel. I have watched many...

• Replies: 4
• Views: 4,395
03-25-2012, 01:03 PM
13. ### using a binary response for a mixed model

Hello, My journey through mixed models (which is documented in past questions) has been an arduous one, however I appreciate being introduced to...

• Replies: 0
• Views: 1,529
03-25-2012, 01:01 PM
14. ### Conditional regression

Hi all, I am trying to run explanatory regression: Y = alpha + Beta1*X*I{X.*Y>0}+Beta2*X*I{X.*Y<=0} where I{} is indicator function Since...

• Replies: 2
• Views: 2,195
03-24-2012, 05:49 PM
15. ### Best way to control for weekdays when regressing sales data against time.

I'm trying to use multiple regression to model sales data per day since Jan 1, 2010. I have established a "time index" to facilitate this. So...

• Replies: 2
• Views: 2,127
03-24-2012, 05:49 PM
16. ### Random Effects Model and Serial Correlation

I am working on a model where I am using a random effects model. This might seem like a simple question but does the use of the random effects model...

• Replies: 0
• Views: 1,431
03-24-2012, 10:13 AM
17. ### p-value of anova when comparing models

I am asking a new question, however the dataset is related to other questions that I have posted. I am running lmer to determine which factors have...

• Replies: 0
• Views: 1,881
03-24-2012, 09:59 AM
18. ### multiple linear regression rejected - searching for alternative model

Hey there! I am currently working on a regression model for a logistics problem which includes the transport time as dependent variable and a...

• Replies: 1
• Views: 1,760
03-21-2012, 11:29 PM
19. ### I think I may finally understand, but a few questions

Please note that you will find a simplified question below in case you do not have the time to check all of my scripts in the first two posts, but...

• Replies: 6
• Views: 2,036
03-21-2012, 12:28 PM
20. ### which regression analysis model shall i use?

i am conducting a research on 9 insurance companies from which a 5 year data is collected. Thus, i have to use panel model, but which model fixed...

• Replies: 0
• Views: 1,406
03-21-2012, 04:55 AM
21. ### Interpreting the conclusion of t-test and explaining the p-value

Hi, I'm working on an assignment which asks me to interpret the conclusion of my t-test regarding the average reading score and the student teacher...

• Replies: 0
• Views: 5,846
03-21-2012, 02:13 AM
22. ### Regress y on y-hat

I need some help to prove that when you regress y on y-hat, the least squares regression line is y = y-hat. y = 0 + 1(y-hat). Thanks!

• Replies: 0
• Views: 2,030
03-20-2012, 02:49 PM
23. ### Back-calculating correlation coefficient for transformed data

Hi everyone, This is my first post on this board so please excuse if I sound like a n00b. I am doing a meta-analysis on plant physiology studies,...

• Replies: 0
• Views: 2,138
03-20-2012, 01:08 PM
24. ### Plotting

Is there any way to plot a normal distributions density tilted on its side along the regression line of a simple linear regression. Meaby just 3-5...

• Replies: 2
• Views: 1,843
03-20-2012, 08:57 AM
25. ### Transforming dependent variable

I am using a multiple regression with one continuous DV and 9 IVs (mainly categorical and one continuous). My DV, as the mean score on a...

• Replies: 3
• Views: 4,932
03-20-2012, 07:17 AM
26. ### Mediation question

If you want to test the hypothesis that the gender difference in brooding will account for the gender difference in anxiety, what would be my...

• Replies: 1
• Views: 1,294
03-18-2012, 04:13 PM
27. ### xtlogit coefficient interpretations

I'm working on a project where I am using a logit model in the program Stata. I'm using the xtlogit command with panel data for city and years. My...

• Replies: 0
• Views: 3,557
03-17-2012, 01:46 PM
28. ### Coefficients of delta-lognormal modeling

I am trying to understand delta-lognormal modeling. Please bear with me. I am applying this method to some fishery data. This method combines...

• Replies: 2
• Views: 3,962
03-16-2012, 11:38 AM
29. ### plotting moderation

Hi, I know that for most of you this will sound like a stupid question but I am teaching myself regression and I am quite new.. Does it make sense...

• Replies: 1
• Views: 3,628
03-16-2012, 09:30 AM
30. ### Help! model comparison in logistic regression

Dear all, I'm working on a logistic regression and have now obtained two competing models (one computed by hand, the other with "step" in R). In...

• Replies: 3
• Views: 3,119
edi
03-16-2012, 03:17 AM
31. ### When to address regression diagnostics on residuals?

Hi, I have some data and have run a regression with all the variables in. I have then run the residual diagnostics but there are some issues. ...

• Replies: 1
• Views: 2,058
03-14-2012, 05:08 PM
32. ### Possible to analyze cross lag panel data with regression alone (no SEM)?

I have 2 (soon to be 4) waves of panel data. I have a relatively small sample size so I don't think I should use SEM - also I don't really...

• Replies: 7
• Views: 14,018
03-14-2012, 10:57 AM
33. ### Help! Deriving a support vector machine

Given a training set of points not necessarily linearly separable, we have an SVM obtained by minimizing \frac{1}{2}\lambda \left \| \mathbf{w}...

• Replies: 0
• Views: 1,460
03-13-2012, 08:33 PM
34. ### Multiple logistic regression intercept

Hello guys and gals, I'm having a me***own trying to understand exactly what the intercept of a multiple logistic regression is telling me/ or if...

• Replies: 3
• Views: 3,371
03-13-2012, 12:29 AM
35. ### Regression with continuous and dummy-coded categorical variables

Hi everyone, I am trying to figure out differences in the proportions of fallen trees in three ZONES, and nested within ZONES, differences in...

• Replies: 0
• Views: 2,335
03-12-2012, 06:14 PM
36. ### growth regression results

I am doing a standard neoclassical growth regression for the European member states for the period 1991-2010. I regress GDP per capita growth on...

• Replies: 0
• Views: 1,750
03-12-2012, 06:02 PM
37. ### 1 predictor, 2 different values for baseline statistic & change statistic?

Hi, I am conducting a Cox Regression for my first time. I created a simple model with only 1 predictor (categorical), one dependent variable...

• Replies: 0
• Views: 1,894
03-12-2012, 04:09 PM
38. ### Regression on sales,markdown,avgstock

OUTPUT 1: Call: lm(formula = TySalesUnit ~ TyMarkdown + TyAvgStockUnit) Coefficients: t value Pr(>|t|) ...

• Replies: 0
• Views: 1,668
03-12-2012, 06:46 AM
39. ### The standardized and non standardized coefficients gives diff results

Hi. Some coworkers ran a regression and used first the beta to analyze the strength of the independent variables in a regression. However all the...

• Replies: 7
• Views: 6,082
03-09-2012, 05:21 PM
40. ### Binomial regression with x as the dependent variable and n as an independent variable

Hi all I have a sample size of 100. Out of 100 a certain number are successful at stage one. Of those successful at stage one some are successful...

• Replies: 15
• Views: 4,371
03-08-2012, 05:59 PM
41. ### warning at logistic reg.

Hello, I am trying to do logistic regression analysis. The problem I face is that this warning comes out in my output : Due to redundancies,...

• Replies: 0
• Views: 2,624
03-08-2012, 06:51 AM
42. ### Binary DV and orthogonal contrasts

HEEEEEEEEELLLLPPPPPP!!!!! The data I am trying to analyse has a binary dependent variable (1=yes, 0=no) and tow factors. Factor 1 is a treatment...

• Replies: 0
• Views: 1,712
03-08-2012, 04:53 AM
43. ### Single parent-offspring regression

Does anyone know how to do this? I can't find the web page I found with the full explanation:shakehead Failing that, I am carrying out a study...

• Replies: 0
• Views: 3,019
03-08-2012, 03:03 AM
44. ### Categorical variables - Logistic regression

Hello, I am trying to run a logistic regression model. I have 4 numeric and 1 categorical variable which are significant. The categorical...

• Replies: 5
• Views: 3,878
03-07-2012, 02:06 PM
45. ### Moderation, GLM, and interactions. Discrepent results...

Hello all, I'm running a GLM to test for moderation. One of my interaction terms (the product of two continuous variables) looks suspicious......

• Replies: 0
• Views: 2,544
03-06-2012, 07:04 PM
46. ### Need help understanding an equality associated with regression analysis

Hi everyone, I am attempting to understand the implications the equality listed below has in regards to regression models. The equality is...

• Replies: 4
• Views: 2,171
03-06-2012, 04:20 PM
47. ### Is Slope A statistically different from Slope B? *URGENT*

Hey everyone, Really need urgent help here. I am trying to determine if the change in the slope of a line (beta) is statistically significant...

• Replies: 7
• Views: 24,601
03-06-2012, 11:39 AM
48. ### Does fitting of a regression line as such contribute to mass significance?

Is the fitting of a regression line (least squares, for a given number of predictors) as such to be regarded a statistical test that can contribute...

• Replies: 0
• Views: 1,601
03-06-2012, 05:04 AM
49. ### Semi-saturated Fixed Effects

Today my supervisor instructed me to try to use semi-saturated Fixed Effects analysis. I have tried searching for "semi-saturated" and "saturated"...

• Replies: 4
• Views: 2,815
03-04-2012, 01:15 PM
50. ### Logistic Regression

Hi, I am using R. For example, Y=β0 + β1X1+ β2X2 = log (a/(1-a)) where a = probability >g1<-glm(Count~X1+X2,family="binomial")...

• Replies: 1
• Views: 1,312
03-02-2012, 04:39 PM
51. ### 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: 7,428
03-01-2012, 06:01 PM
52. ### log linear model for dependence

Hi I fitted a log linear model (proc genmod dist=negative binomial link=log) to see any dependence/association between 3 categorical variables. I...

• Replies: 2
• Views: 1,955
szm
02-29-2012, 02:53 PM

Use this control to limit the display of threads to those newer than the specified time frame.

Allows you to choose the data by which the thread list will be sorted.

Note: when sorting by date, 'descending order' will show the newest results first.