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# 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: 18,678
10-11-2014, 12:02 PM
1. ### Estimating parameters using a different method?

Hi, I have a probability distribution which has two parameters \alpha and \beta I re-parametrized the distribution such that the new...

• Replies: 2
• Views: 1,114
08-16-2012, 08:43 AM
2. ### Estimating the number of cases (sample size)

Hi there! I've a perhaps simple question: how can I estimate the number of measurements (cases) to obtain a accurate result? Here an example:...

• Replies: 6
• Views: 1,375
07-17-2016, 11:00 PM
3. ### Estimation Maximization

Hello everybody! I have a general question concerning Estimation Maximization (EM): I understand from literature research, that EM is not possible...

• Replies: 3
• Views: 3,860
11-18-2013, 05:19 AM
4. ### Estimation of suitable significance level for high numbers of experiments

I am a scientist and work with high numbers of experiments. For example: I have tested 1000 different parameters between 2 groups. I found 10...

• Replies: 0
• Views: 1,049
06-13-2016, 11:37 AM
5. ### evaluating loess fit

Hello Everyone, I am trying to evaluate the fits of data using loess() in R. I cannot seem to find any established methods for determining the...

• Replies: 1
• Views: 1,915
12-13-2011, 07:13 PM
6. ### Evaluation of Bayesian Model

How can I evaluate if a created bayesian model is reliable model that makes good predication? To conclude if the created bayesian model produces a...

• Replies: 1
• Views: 1,116
05-11-2016, 02:03 AM
7. ### Event Clustering in an Event Study

Dear All, I conducted an Event-Study to assess price effects. Now the result show widely fluctuating abnormal returns. Since the event-date across...

• Replies: 1
• Views: 9,631
03-09-2009, 08:41 AM
8. ### Event Study - Impact from different periods

Hi! I was wondering if you could help me with something. I would really, really appreciate it. As it is some time since i did my econometrics...

• Replies: 0
• Views: 1,093
02-24-2015, 10:25 AM
9. ### Event study analysis significance tests

Dear all This is my first post in the forum. I'm sorry if this question already came up, I used the search function but did not find anything. I...

• Replies: 0
• Views: 1,601
08-28-2015, 04:14 AM
10. ### Event Study Methodology - Event Window

Hi, I am currently beginning an event study on the effect of the Fukushima crisis on U.S. electrical utility companies. I am completely new to...

• Replies: 0
• Views: 2,747
03-09-2012, 07:52 AM
11. ### Event study on index

Dear all, I'm conducting several event studies for my thesis. But I'm wondering if it's possible to conduct one on an index. I want to see if the...

• Replies: 1
• Views: 1,040
08-01-2013, 03:43 AM
12. ### Event study t-test help

Hi, Im doing a report about clinical trials and abnormal effect returns on the stock market. I have collected 7 events with an eventwindow of -5...

• Replies: 0
• Views: 3,590
05-04-2011, 03:14 PM
13. ### EVIEWS 7: help required in analysis of Common Effect Model

Dear All, I m a new user and need to know how to interpret the following output. Its urgent. please help: Dependent Variable: FDI_? ...

• Replies: 0
• Views: 1,117
07-12-2014, 12:16 PM
14. ### eviews question

Hello everybody, I need fto find evieuws somewhere on the web but i can't find it. Doesn anyone know where i can download for no charge? Thx for...

• Replies: 3
• Views: 5,562
09-28-2011, 06:34 AM
15. ### examples from discrete data where an underlying continuous distribution is present...

Hello. I am not sure if people here are familiar with the Pearson (as in Karl Pearson) Yule debate concerning whether some types of discrete data are...

• Replies: 0
• Views: 1,173
04-11-2013, 11:25 PM
16. ### Examples of Repeated measures Poisson Model

Does anyone have a good example of repeated measures Poisson Model? I want to try paired Poisson GLM to analyze so called spectral count data. In...

• Replies: 0
• Views: 2,553
Jyk
01-29-2013, 05:05 PM
17. ### Excel sample size comparison

I have two independent groups that tested their own sample size (based on their group's sampling rules) of the same data for process failures. Group...

• Replies: 0
• Views: 258
09-18-2017, 12:47 PM
18. ### excel to SAS

library work 'c:\documents and settings\desktop\s' data s.sas; infile 'C:\Documents and Settings\Desktop\sas.prn' firstobs=2; input subject salary...

• Replies: 6
• Views: 4,318
11-07-2011, 04:08 PM
19. ### Excess Return - Benchmark Returns

Well, I am new in the field of business research with very little stastics knowledge. Problem is that I have to calculate <excess return> which...

• Replies: 3
• Views: 5,544
04-06-2011, 08:11 PM
20. ### Exchangeable or Unstructured GEE

Hi all, I was wondering if someone can give me a clear understanding on the difference between exchangeable working correlation matrix and...

• Replies: 1
• Views: 5,081
06-06-2014, 08:07 AM
21. ### Exogenous and Endogenous Variables

How can you identify exogenous and endogenous variables from a chart that uses arrows and slings?

• Replies: 1
• Views: 4,218
02-12-2010, 03:17 AM
22. ### Expected Value

A list of n items is arranged in random order; to find a requested item, they are searched sequentially until the desired item is found. So, how will...

• Replies: 9
• Views: 6,798
05-08-2010, 05:29 AM
23. ### Expected Value of a Sample Range

The function for the expected value of a sample range is given on the following page. http://www.jmu.edu/docs/sasdoc/sashtml/qc/chapc/sect9.htm ...

• Replies: 7
• Views: 17,442
10-16-2008, 07:34 PM
24. ### Experimental design survey and rank data analysis

I want to conduct a survey in which i will give to participants in two treatments a rank order(basically they will have to rearrannge items in...

• Replies: 0
• Views: 1,606
02-11-2012, 03:25 AM
25. ### Experimental design: ANOVA? help!

Hello, I have to analyze one paramater (lipid content) of seeds from 5 different cultivars. I am planning to do two independent analysis of the...

• Replies: 3
• Views: 1,539
03-05-2017, 09:09 AM
26. ### Explanation of the Log likelihood criterion

Hello all, I'm a counseling doctoral student working on dissertation with a mixed methods approach (though qual dominant) Part of my...

• Replies: 2
• Views: 417
06-29-2017, 07:16 PM
27. ### Exploratory Factor Analysis problems

Independent Variable: 49 state survey of state court administration: how much power does the state court administrator have over 31 separate...

• Replies: 2
• Views: 1,321
08-12-2015, 07:44 AM
28. ### Exploratory Factor Analysis with Ordinal Data

Hi folks, I am in the midst of absorbing as much information on exploratory factor analysis as I can. I studied this method once before but not to...

• Replies: 2
• Views: 1,340
06-19-2015, 04:10 PM
29. ### exponential EWMA- statistical process control to monitor time between events

I am looking into control charts to monitor time between events for rare events. A quick literature review revealed that the following four methods...

• Replies: 0
• Views: 1,436
02-06-2014, 04:10 AM
30. ### Extrapolating to a population from a sample

Hello, I am having problems with a seemingly simple question. Here is the situation: Imagine, I grow 3 kinds of trees (A, B, C) for sale in a...

• Replies: 4
• Views: 1,967
07-18-2013, 02:22 PM
31. ### Extreme events...

Hi. Is {w:P(w) is very small} acceptable to translate the meaning of extreme events given in the following sentence: An extreme event is defined as...

• Replies: 6
• Views: 4,596
07-14-2010, 07:47 PM
32. ### eye beams

A person knows when they are being watched. Has anyone confirmed this effect to some level of significance? If so, is "it" detectible using...

• Replies: 0
• Views: 2,060
04-15-2010, 08:31 AM
33. ### F statistic values more than 1000 (sample like 2000 and 5000 )

I am studying the water parameters from three different groups. I performed ANOVA and found for few parameters F value was way high to report. I...

• Replies: 1
• Views: 1,246
05-31-2015, 07:28 AM
34. ### F-test Analyis HELP

I've just carried out an f-test on excel as I want to perform an independent t-test so I wanted to check the equality of variances. I have always...

• Replies: 4
• Views: 2,792
07-16-2011, 03:45 PM
35. ### F-value and Post-hoc tests conflict

What does it mean when you obtain a significant F-value for an ANOVA but when you perform the post-hoc test no pairwise comparisons are significant?...

• Replies: 0
• Views: 3,878
07-17-2009, 02:40 PM

Hey guys, Is there a website I can visit that will give me statistics on facebook? IE how many users, active users etc etc over the past few...

• Replies: 1
• Views: 1,025
09-20-2012, 12:17 AM
37. ### Factor Analysis

I plan designing a questionnaire. The fact is the questions asked involving nominal variables and open ended question. Can I proceed factor analysis...

• Replies: 0
• Views: 1,154
06-12-2012, 02:32 AM
38. ### factor analysis

Can I do a factor analysis with one dependent variable and one independent variable? Do I need to have at least two dependent variables to do a...

• Replies: 5
• Views: 1,172
07-29-2014, 09:02 AM
39. ### Factor analysis

Dear members, I have 20 questions (Likert 5-point), ultimately I want one variable: "affect". So I ran a factoranalysis, which gives me 4...

• Replies: 1
• Views: 2,303
01-03-2016, 12:15 PM
40. ### Factor Analysis and Cronbach Alpha

Hi, I would like to ask you about type of data which can be used for factor analysis or for control internal reliability (Cronbach Alpha). I'm...

• Replies: 0
• Views: 1,880
01-18-2015, 04:08 PM
41. ### Factor Analysis help--Senior Thesis

I am an undergraduate and working on my senior research project. I am doing a study of the construct validity of a critical thinking test using...

• Replies: 2
• Views: 3,912
11-30-2008, 07:50 AM
42. ### Factor Analysis or Something Else

Hey guys, So I was a little uncertain about where to best post this, so I apologize if this is in the wrong place, but I had a statistical...

• Replies: 4
• Views: 2,102
06-22-2015, 07:27 AM
43. ### Factor Analysis Projections

I'm working with some time series data and I'm trying to determine if using factor analysis as a clustering method will lead me to a different...

• Replies: 0
• Views: 2,171
08-27-2008, 10:06 PM
44. ### Factor Analysis Question

Hi everyone, I'm a Trainee Clinical Psychologist, not a statistician but we have research to do as part of our training so I'm hoping someone here...

• Replies: 5
• Views: 3,251
11-10-2008, 04:27 PM
45. ### Factor analysis question

Hi, I was hoping somebody might be able to help with a question about factor analysis. Is there a problem with putting three different groups (of...

• Replies: 1
• Views: 1,407
12-30-2013, 12:42 PM
46. ### Factor Analysis Transformations: Thesis Help Needed Please!

Hi I'm really hoping that someone will be able to help me? I am currently in the process of running a factor analysis. The individual items...

• Replies: 1
• Views: 3,133
08-20-2008, 04:06 PM
47. ### Factor Analysis vs Correspondence Analysis

I was just reading about Factor and Correspondence Analysis. I am a bit confused from the time I realised that Correspondence Analysis also uses...

• Replies: 1
• Views: 7,216
12-27-2010, 05:00 AM
48. ### Factor Analysis vs. Principal Component Analysis

I've asked this question on here a while back but didn't quite get an answer that helped me understand what is truly different about these two...

• Replies: 8
• Views: 4,130
01-09-2013, 07:31 PM
49. ### Factor analysis with multiple constructs

Hi all, Have a question related to factor analysis and how to execute it. For instance, in a survey you measure 3 seperate constructs, and use 5...

• Replies: 2
• Views: 1,198
03-24-2017, 08:36 AM
50. ### Factor analysis, what type of data can I use?

Hello everyone, I have a social science dataset composed of circa 40 variables. The data types I am using are quite diverse. The variables I am...

• Replies: 18
• Views: 7,228
07-08-2013, 11:38 AM
51. ### Factor Analyzing Price Time Series

Hi I have a question regarding using factor analysis for price time series (specifically, online advertising prices of various versions of ads). ...

• Replies: 0
• Views: 1,823
11-20-2014, 04:25 AM
52. ### Factor Scores

I'm working on a political science project in which a number of the crucial variables are highly correlated. My approach would be to create factor...

• Replies: 0
• Views: 1,201
03-14-2013, 08:09 AM
53. ### Factor scores to classify groups?

Hi there, I have carried out a principal component analysis and I would like to use the factor scores to classify 5 groups of respondents. What...

• Replies: 0
• Views: 2,086
gav
01-16-2012, 10:03 AM
54. ### Factorial ANOVA

I am reading a paper looking at the effect of interventions (an aerobic exercise regime group, a stretching exercise regime group, plus a contol...

• Replies: 3
• Views: 6,046
10-12-2011, 02:49 AM
55. ### Factorial experiment in CRD with unequal replications

Hi guys, i am a graduate student in statistics. i want to test for the main and interaction effect of 3 treatments on a group of patients. let say...

• Replies: 3
• Views: 1,521
03-18-2016, 06:59 AM
56. ### False Coverage Rate - adjusting confidence intervals for multiple comparisons

Hello, I could do with some help regarding correcting confidence intervals for multiple comparisons. I have carried out a number of multiple...

• Replies: 2
• Views: 1,204
03-03-2016, 09:09 AM
57. ### FDR or FWER with DIFFERENT tests

hello everyone, My question is about correcting p-values for multiple testing, either through False Discovery Rate or FamilyWise Error Rate...

• Replies: 1
• Views: 3,220
05-08-2013, 02:24 AM
58. ### Feedback on bootstrapping effect size and t-values

I am trying to learn to bootstrap per conversation here the other day. I know there are packages to bootstrap but wanted to process more...

• Replies: 31
• Views: 4,580
04-28-2015, 09:25 PM
59. ### Financial Research -> Event Study (of stock prices), which Research Strategy?

I do an Event Study to study stock price reactions to a specific event. I don't understand how this fits in the research onion: Could...

• Replies: 0
• Views: 115
10-02-2017, 07:55 AM

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