1. Announcement:
05-10-2017
Views:
1,876
Page 17 of 54 First 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 ... Last
Threads 961 to 1020 of 3193

# Forum: Statistical Research

Statistical theory and methodology. Mathematical statistics. Parametric inference. Nonparametric inference.

1. ### Sticky: Proof of the day

In this thread we post one (or more if you can't wait) proof a day. I'll start by proving the that V=\sigma^2(X'X)^{-1} in the linear...

• Replies: 14
• Views: 18,737
10-11-2014, 12:02 PM
1. ### General vs Generalized Linear Models

While defending my thesis yesterday, this difference was pointed out. Surprised that there was actually a difference I wasn't aware of, I've looked...

• Replies: 12
• Views: 13,652
06-23-2015, 12:52 PM
2. ### Generalised Lambda Distribution

Hello, Can anyone help me, I am trying to use the Generalized Lambda distribution to model some parts in an assembly, but apart from Wikipedia...

• Replies: 6
• Views: 247
10-17-2017, 01:33 PM
3. ### Generalized estimating equations and multiple imputation

Hi, I'm running a Generalized estimating equation model with multiple imputed data but I can not get a pooled outcome. Do anyone have a solution to...

• Replies: 4
• Views: 2,994
10-29-2014, 03:06 PM
4. ### Generalized Estimation Equations

Dear all, I have a data set with three independent variables and one dependent variables. Two independent variables are factors with several...

• Replies: 0
• Views: 1,002
08-23-2013, 04:01 AM
5. ### generate constrained combinations

I have some vectors like this V1= V2= V3= V4= I would like to get all possible combinations from these vectors that look like this ,V2,V3,v4]...

• Replies: 0
• Views: 2,319
11-05-2014, 05:14 PM
6. ### Generate Data for Correlated Continuous and Discrete variables

Hi I was wondering if anybody could suggest an appropriate approach for the following... I have one independent variable, X, which takes the...

• Replies: 5
• Views: 4,084
11-11-2011, 02:29 PM
7. ### generate data for logistic regression simple question

Hi there, If I want to see how good can I estimate the coefs in the simple linear model y=b0+b1*x+e when X follows exponential with mean 3 (or...

• Replies: 1
• Views: 4,414
08-28-2008, 03:19 PM
8. ### generate overdispersed poisson data

Hi there, Can anyone tell me how to produce overdispersed poisson data? An algorithm or something? I find it difficult. Thanx in advance for...

• Replies: 5
• Views: 7,144
06-19-2009, 03:17 AM
9. ### Generate Space Filling Designs with nonlinear constraints on the design space

Hey everybody, thanks for taking the time to view my post. I was wondering if anyone knows of any software that will allow a user to create a...

• Replies: 0
• Views: 792
07-08-2013, 08:32 AM
10. ### Generating a multi-parameter space and sampling from it

Hi all, I have a long list of combination of parameters which covary. I would like to sample from it but not exactly the same values. What I'd like...

• Replies: 0
• Views: 1,265
06-01-2013, 11:49 AM
11. ### Generating Beta binomial random variables

Hi, I am looking for the theoretical method/algorithms to generate beta-binomial random variables. I would like to kindly request you to suggest...

• Replies: 0
• Views: 1,195
11-19-2012, 10:17 AM
12. ### Generating correlated binary data

Suppose I have a column of random binary numbers. I would like to find a way to generate a second column with the same number of cases that has a...

• Replies: 2
• Views: 3,417
03-19-2010, 06:31 PM
13. ### Generating Skewed Normal Distributions

I want to generate Random Normal Distributions with specific degrees of Skewness and Kurtosis. So far I have looked at the following two approaches:...

• Replies: 17
• Views: 42,370
06-03-2016, 10:10 PM
14. ### Genes comparison in SPSS

Hey guys, I have an excel sheet I imported to SPSS all the rows are genes (over 3200), and for each gene I have its expression level in 6...

• Replies: 1
• Views: 1,307
06-19-2016, 03:38 AM
15. ### geometric argument for constraints on r_xz given r_xy and r_yz

Today a labmate asked the following question: if we have three random variables x, y, z, and we know the correlations r_{xy} and r_{yz}, what...

• Replies: 5
• Views: 4,057
05-18-2015, 04:16 PM

I have a research project and I am really confused on what I should do with the data. I asked people to complete a survey. The survey had 10...

• Replies: 1
• Views: 1,586
04-29-2011, 04:26 PM
17. ### Gibbs Point Process

Does anyone knows what is the aim of using Gibbs marked point process?! I read a paper that used this method to find the best configuration of...

• Replies: 0
• Views: 1,020
11-29-2012, 05:41 PM
18. ### Gibbs sampler problems

I am trying to implement the gibbs sampler found here http://www.people.fas.harvard.edu/~plam/teaching/methods/mcmc/mcmc.pdf on page 175. It is...

• Replies: 1
• Views: 1,643
07-23-2013, 12:46 PM
19. ### GIS data questions

Hi All, I have to get some GIS data for a project I am working on but I honestly have no idea where to start. What I need is as follows: 1. I...

• Replies: 5
• Views: 1,061
06-18-2015, 11:21 AM
20. ### Giving statistical significance to the max value of a vector

Hi, I have many samples, each sample is a vector with n elements. Each element represents a state, and the value in a cell is how likely this...

• Replies: 4
• Views: 1,941
10-29-2012, 11:32 AM
21. ### GLM on bimodal Data possible?

Hello, I've got data, in which the target variable is bimodally distributed. The target variable is also bimodally distributed conditional on the...

• Replies: 0
• Views: 2,468
04-29-2014, 03:57 PM
22. ### GLMM - fitting random effects to a complex field design

Dear forum users, I’d be very grateful to hear about any opinions on a problem I’m having with the random effects side of my generalised linear...

• Replies: 6
• Views: 2,110
08-03-2014, 05:07 AM
23. ### GLS in MATLAB

Hi, Can anybody help me to solve a simultaneous equation model with Generalised least square in MATLAB?

• Replies: 0
• Views: 3,709
11-15-2012, 03:12 AM
24. ### God you people are clever!

Hi, :wave: I'm collecting data from a single group of 15 participants showing their improvement in a 5 stage levelled test before and after an...

• Replies: 5
• Views: 5,054
05-08-2010, 12:52 AM
25. ### GOF / Diagnostics for a GLM Binomial-Logit Family Model STATA

Hello, I am using a GLM Binomial-Logit Family Model. I am using this model because my dependent variable is a proportion. Having carried out the...

• Replies: 0
• Views: 4,174
05-20-2010, 03:59 AM
26. ### GOF Analysis/Discussion

What actions constitute an analysis of goodness-of-fit for a regression model? What are the typical graphical displays used in this analysis of...

• Replies: 1
• Views: 732
04-14-2017, 10:33 AM
27. ### GOF measures

When we validate a statistical model, should we only consider the traditional Goodness-Of-Fit measures? Are there other ways in which the model...

• Replies: 1
• Views: 689
04-14-2017, 10:48 AM
28. ### Good Book on Mathematical Statistics

I'm a mostly self-trained analyst with degrees in the social sciences but not in statistics. I'm looking to improve my knowledge of the mathematics...

• Replies: 9
• Views: 2,716
09-17-2014, 07:09 AM
29. ### Good sources (books, articles, ....) on the history of Monte Carlo methods?

I am finally entering the final step of my PhD. Chapter 1 of my dissertation has already been published, Chapter 2 has been submitted for publication...

• Replies: 4
• Views: 2,462
07-22-2016, 05:38 AM
30. ### Goodness of Fit Applicability

I'm Looking for some advice on comparing the results of two different sampling methods (sampling the same population) against each other. The two...

• Replies: 2
• Views: 1,231
02-13-2013, 05:09 PM
31. ### Goodness of fit for 2D histograms

Hello all, I've dragging this problem for quite a while now and I'd really appreciate it if someone could help me whit it. I have two sets of...

• Replies: 0
• Views: 1,714
04-11-2012, 07:11 AM
32. ### Goodness of fit test for categorical data with non-negative real numbersca

An experiment that I conduct has 5 outcomes: A, B, C and D. I conduct 12 trials for this experiment. I observe, for example: Outcome : Frequency...

• Replies: 2
• Views: 1,510
07-14-2016, 01:13 AM
33. ### Gpower

I'm wanting to run a study where I record motor evoked potentials evoked from a group of participants they view images of people performing reach and...

• Replies: 2
• Views: 5,108
01-11-2011, 08:28 AM
34. ### Grade (A, A-, B+, B, B-....)

Im planning to do run some correlation and different groups stat test on my data. In my all scenarios, Grade is a dependent variable. So, my question...

• Replies: 2
• Views: 3,191
04-11-2011, 06:32 AM

Hello! This is probably rather basic, but I'd appreciate any input. The sample: I have survey responses from a sample of about 4000 German...

• Replies: 2
• Views: 2,318
08-30-2011, 03:00 AM
36. ### Granger Causality test help!

I have run a Granger causality test on two time series but im not sure based on the output whether or not to reject the null hypothesis. Below is the...

• Replies: 0
• Views: 5,263
02-21-2009, 01:38 PM
37. ### Graphical Method of Testing Cox Regression Model Fit

Hi all, Since my last post you'll be happy to know i have successfully built a couple of what appear to be reasonable proportional hazard models...

• Replies: 0
• Views: 960
06-17-2015, 10:58 AM
38. ### Greatly unbalanced sizes of samples for Mann-Whitney U test.

Hello, I want to compare two independent samples and by doing a little research I have concluded that the Mann-Whitney U test is the most...

• Replies: 1
• Views: 6,883
12-02-2010, 05:55 AM
39. ### Grou x Time interactions

Hi, I conducted in my clinical trial a mixed anova with repeated measures. What can I conclude if I find significant interactions Group x Time and...

• Replies: 2
• Views: 11,831
01-10-2011, 05:26 AM
40. ### grouing variable,likertscale firm,performance,multvariate analysis

My research is aim to investigate the mechanisms through which IT influence sustainability of competitive advantage. The data is collected through...

• Replies: 0
• Views: 1,305
12-11-2011, 05:45 PM
41. ### Group comparisons using Kruskal-Wallis AND a categorical mediator?

Hi there, I have four patient groups which I compare in terms of a contiuous variable using Kruskal-Wallis (due to small sample sizes and...

• Replies: 0
• Views: 1,167
11-07-2012, 06:39 AM
42. ### Group theoretic approach to ANOVA

Hello, I have been following the works of Diaconis, Viana and van de Ven and have a query about the approach taken in van de Ven's dissertation...

• Replies: 3
• Views: 1,713
07-28-2011, 03:05 AM
43. ### grouping categorical variables for regression

I'm working with survey data dealing with reproductive health among women with HIV. I would like to explore possible factors which may contribute to...

• Replies: 0
• Views: 3,383
11-20-2010, 10:20 AM
44. ### Grouping distributions together based on significance

Hi, all: My PhD research has wandered into an area that requires more statistical analysis than I am currently comfortable with, and so I'm...

• Replies: 2
• Views: 2,098
05-21-2010, 12:46 PM
45. ### grouping doubt

Hi , I am new to base sas trying to learn on my own , I have a doubt , I have a data set which contains the information about the firms , they...

• Replies: 0
• Views: 2,101
05-12-2009, 09:41 PM
46. ### Grouping Observations

Hello! New to the forum here and looking for help. I have 3 separate "Urban" monitoring locations. 10 observations were made at each location. ...

• Replies: 3
• Views: 232
09-29-2017, 03:59 PM
47. ### Groups split /Low and High

HI ALL, I would like to ask about the best and accurate way to dividing groups as low and high. And how I can conducted this analysis using the...

• Replies: 0
• Views: 1,057
05-02-2012, 09:19 AM
48. ### Growth Curve Modeling and Covariates

Hi All, I am in the midst of trying to work out an issue I am having with my model. I have an environmental variable that I want to use as a...

• Replies: 0
• Views: 984
11-01-2012, 01:18 PM
49. ### Gumbel Copula

Does anybody have some code or a paper to show how to simulate n dimensional Gumbel copula ?

• Replies: 0
• Views: 2,405
08-12-2009, 02:55 PM
50. ### Hartigan's Dip Test for Bi-Modality: Rejecting surprising distributions

Hi, I'm new here. Thanks for providing this forum! I'm checking some separate sample distributions for bi-modality since most but not all of them...

• Replies: 1
• Views: 7,012
12-29-2011, 08:05 PM
51. ### Have population, use inferential stats? Non-normal dependent variable, what to do?

Statistics people! I have two questions for you. I am NOT a statistician so please be nice and answer simply :) Background: We are looking at...

• Replies: 1
• Views: 1,338
06-20-2014, 09:07 PM
52. ### Having a hard time deciding on what test to use for data

Here is the premise: There are large events taking place on park land. We are using noise disturbance hardware to measure decibels during and not...

• Replies: 6
• Views: 1,868
07-28-2014, 02:05 PM
53. ### Heckman regression models

I am using a 2step heckman regression model and I want to evaluate that probit looks okay and that the model converges and that there are no "red"...

• Replies: 2
• Views: 1,306
09-26-2016, 03:27 PM
54. ### Hello Everyone, need stats help

Hello everyone, :wave: I'm new to this forum. I need some help figuring out what kind of analysis to run for my undergraduate thesis. I did...

• Replies: 0
• Views: 2,538
04-09-2011, 04:48 PM
55. ### Help Hierarchial Cluster Analysis & Categorical data

:confused: Hi, I am trying to cluster my variables which are all the letters of the alphabet by the observations of many participants in a...

• Replies: 0
• Views: 2,415
03-16-2013, 06:21 PM
56. ### Help regarding th topic: Shrinkage Precision Matrix Estimation with Application

'Shrinkage Precision Matrix Estimation with Applications to Beamforming' or 'Shrinkage Estimation Precision Matrix with Applications to Beamforming'....

• Replies: 1
• Views: 218
08-14-2017, 07:36 AM
57. ### HELP - citation model in R

Hello everyone. I need help with the citation model as explained in This article "Bibliometric tools applied to analytical articles: the example...

• Replies: 3
• Views: 1,793
09-05-2016, 09:04 AM
58. ### Help - problem

Hi I have a variable VA and want to know if there are significant differences in this variable between group A and group B. N = 93 samples...

• Replies: 1
• Views: 2,285
06-17-2009, 10:15 PM
59. ### Help about kappa coefficient?

Is it acceptable using kappa coefficient for examining intra-rater agreement? or which statistical measurement do you prefer to use for...

• Replies: 0
• Views: 938
05-05-2013, 05:02 PM

Page 17 of 54 First 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 ... Last

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.