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Forum: Statistical Research

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

  1. Sticky Thread 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...

    Started by Englund‎, 01-18-2014 04:56 AM
    • Replies: 14
    • Views: 18,678
    10-11-2014, 12:02 PM Go to last post
  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...

    Started by arun‎, 08-16-2012 02:01 AM
    • Replies: 2
    • Views: 1,114
    08-16-2012, 08:43 AM Go to last post
  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:...

    Started by unknown‎, 07-17-2016 08:10 AM
    • Replies: 6
    • Views: 1,375
    07-17-2016, 11:00 PM Go to last post
  3. Estimation Maximization

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

    Started by therp‎, 11-17-2013 07:09 AM
    • Replies: 3
    • Views: 3,860
    11-18-2013, 05:19 AM Go to last post
  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...

    Started by AntonS1988‎, 06-13-2016 11:37 AM
    binomial, experiment, false positive, high numbers, significance level
    • Replies: 0
    • Views: 1,049
    06-13-2016, 11:37 AM Go to last post
  5. Question 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...

    Started by penn whitley‎, 12-13-2011 06:10 PM
    goodness of fit, lowess, residuals, rmse
    • Replies: 1
    • Views: 1,915
    12-13-2011, 07:13 PM Go to last post
  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...

    Started by ozkan‎, 05-09-2016 05:41 AM
    bayesian, reliability
    • Replies: 1
    • Views: 1,116
    05-11-2016, 02:03 AM Go to last post
  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...

    Started by Christoph‎, 02-06-2009 02:20 AM
    • Replies: 1
    • Views: 9,631
    03-09-2009, 08:41 AM Go to last post
  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...

    Started by Upper‎, 02-24-2015 10:25 AM
    • Replies: 0
    • Views: 1,093
    02-24-2015, 10:25 AM Go to last post
  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...

    Started by fossle‎, 08-28-2015 04:14 AM
    • Replies: 0
    • Views: 1,601
    08-28-2015, 04:14 AM Go to last post
  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...

    Started by juxtaposition‎, 03-09-2012 07:52 AM
    • Replies: 0
    • Views: 2,747
    03-09-2012, 07:52 AM Go to last post
  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...

    Started by anthonyphilippe‎, 08-01-2013 03:30 AM
    • Replies: 1
    • Views: 1,040
    08-01-2013, 03:43 AM Go to last post
  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...

    Started by Patark‎, 05-04-2011 03:14 PM
    • Replies: 0
    • Views: 3,590
    05-04-2011, 03:14 PM Go to last post
  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_? ...

    Started by Maryam123‎, 07-12-2014 12:16 PM
    common effect model, eviews 7
    • Replies: 0
    • Views: 1,117
    07-12-2014, 12:16 PM Go to last post
  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...

    Started by freddysurgery‎, 12-28-2010 01:20 PM
    • Replies: 3
    • Views: 5,562
    09-28-2011, 06:34 AM Go to last post
  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...

    Started by will22‎, 04-11-2013 11:25 PM
    • Replies: 0
    • Views: 1,173
    04-11-2013, 11:25 PM Go to last post
  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...

    Started by Jyk‎, 01-29-2013 05:05 PM
    • Replies: 0
    • Views: 2,553
    01-29-2013, 05:05 PM Go to last post
  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...

    Started by Compliance Carl‎, 09-18-2017 12:47 PM
    compliance, defect data
    • Replies: 0
    • Views: 258
    09-18-2017, 12:47 PM Go to last post
  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...

    Started by shanehall.m‎, 11-07-2011 09:48 AM
    infile, sas, sas program
    • Replies: 6
    • Views: 4,318
    11-07-2011, 04:08 PM Go to last post
  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...

    Started by SFranck‎, 04-06-2011 07:15 PM
    • Replies: 3
    • Views: 5,544
    04-06-2011, 08:11 PM Go to last post
  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...

    Started by PenguinM‎, 06-06-2014 07:40 AM
    • Replies: 1
    • Views: 5,081
    06-06-2014, 08:07 AM Go to last post
  21. Exogenous and Endogenous Variables

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

    Started by et4u77‎, 02-10-2010 04:04 PM
    • Replies: 1
    • Views: 4,218
    02-12-2010, 03:17 AM Go to last post
  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...

    Started by SmileAli‎, 05-07-2010 06:37 PM
    • Replies: 9
    • Views: 6,798
    05-08-2010, 05:29 AM Go to last post
  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 ...

    Started by Papabravo‎, 10-15-2008 12:27 PM
    • Replies: 7
    • Views: 17,442
    10-16-2008, 07:34 PM Go to last post
  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...

    Started by micdhack‎, 02-11-2012 03:25 AM
    • Replies: 0
    • Views: 1,606
    02-11-2012, 03:25 AM Go to last post
  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...

    Started by Arwen82‎, 02-26-2017 02:18 PM
    • Replies: 3
    • Views: 1,539
    03-05-2017, 09:09 AM Go to last post
  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...

    Started by JD89‎, 06-28-2017 07:13 PM
    • Replies: 2
    • Views: 417
    06-29-2017, 07:16 PM Go to last post
  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...

    Started by cynicalflyer‎, 08-11-2015 03:22 PM
    • Replies: 2
    • Views: 1,321
    08-12-2015, 07:44 AM Go to last post
  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...

    Started by DRMORRIS‎, 06-18-2015 03:35 PM
    • Replies: 2
    • Views: 1,340
    06-19-2015, 04:10 PM Go to last post
  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...

    Started by F_Vial‎, 02-06-2014 04:10 AM
    exponential, moving average process
    • Replies: 0
    • Views: 1,436
    02-06-2014, 04:10 AM Go to last post
  30. Export and Import Model

    Hi I am doing a project examining bilateral trade between Canada and U.S. This model was the most recent in the literature and was advised by my...

    Started by solomon‎, 07-07-2011 01:16 PM
    • Replies: 2
    • Views: 2,032
    04-01-2012, 09:27 AM Go to last post
  31. 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...

    Started by hhveluj‎, 07-12-2013 08:04 AM
    • Replies: 4
    • Views: 1,967
    07-18-2013, 02:22 PM Go to last post
  32. 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...

    Started by tsukiko‎, 07-14-2010 07:41 AM
    • Replies: 6
    • Views: 4,596
    07-14-2010, 07:47 PM Go to last post
  33. 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...

    Started by Outlier‎, 04-15-2010 08:31 AM
    • Replies: 0
    • Views: 2,060
    04-15-2010, 08:31 AM Go to last post
  34. 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...

    Started by mnvanil‎, 05-30-2015 06:01 AM
    anova assumption, anova observations, f statistics
    • Replies: 1
    • Views: 1,246
    05-31-2015, 07:28 AM Go to last post
  35. 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...

    Started by cheekychica‎, 07-15-2011 01:30 PM
    • Replies: 4
    • Views: 2,792
    07-16-2011, 03:45 PM Go to last post
  36. Question 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?...

    Started by mathgeek10‎, 07-17-2009 02:40 PM
    • Replies: 0
    • Views: 3,878
    07-17-2009, 02:40 PM Go to last post
  37. Facebook research

    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...

    Started by irishsam‎, 09-18-2012 10:06 AM
    • Replies: 1
    • Views: 1,025
    09-20-2012, 12:17 AM Go to last post
  38. 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...

    Started by ryan8200‎, 06-12-2012 02:32 AM
    • Replies: 0
    • Views: 1,154
    06-12-2012, 02:32 AM Go to last post
  39. 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...

    Started by eunkum1‎, 07-28-2014 02:23 PM
    • Replies: 5
    • Views: 1,172
    07-29-2014, 09:02 AM Go to last post
  40. 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...

    Started by SPSSBurnd‎, 01-03-2016 09:08 AM
    factor analysis, output, spss, thesis
    • Replies: 1
    • Views: 2,303
    01-03-2016, 12:15 PM Go to last post
  41. 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...

    Started by langouste‎, 01-18-2015 04:08 PM
    • Replies: 0
    • Views: 1,880
    01-18-2015, 04:08 PM Go to last post
  42. 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...

    Started by nswillie‎, 11-20-2008 12:31 PM
    • Replies: 2
    • Views: 3,912
    11-30-2008, 07:50 AM Go to last post
  43. 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...

    Started by jm65701‎, 06-19-2015 11:10 PM
    • Replies: 4
    • Views: 2,102
    06-22-2015, 07:27 AM Go to last post
  44. 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...

    Started by lfalin‎, 08-27-2008 10:06 PM
    • Replies: 0
    • Views: 2,171
    08-27-2008, 10:06 PM Go to last post
  45. 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...

    Started by Officer Pupp‎, 11-04-2008 09:15 AM
    • Replies: 5
    • Views: 3,251
    11-10-2008, 04:27 PM Go to last post
  46. 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...

    Started by GaX‎, 12-30-2013 12:32 PM
    • Replies: 1
    • Views: 1,407
    12-30-2013, 12:42 PM Go to last post
  47. 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...

    Started by Kellyb‎, 08-20-2008 03:27 PM
    • Replies: 1
    • Views: 3,133
    08-20-2008, 04:06 PM Go to last post
  48. 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...

    Started by bsaikrishna‎, 12-27-2010 12:31 AM
    • Replies: 1
    • Views: 7,216
    12-27-2010, 05:00 AM Go to last post
  49. 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...

    Started by lancearmstrong1313‎, 01-02-2013 01:50 PM
    • Replies: 8
    • Views: 4,130
    01-09-2013, 07:31 PM Go to last post
  50. 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...

    Started by cs_ut‎, 03-23-2017 09:28 AM
    • Replies: 2
    • Views: 1,198
    03-24-2017, 08:36 AM Go to last post
  51. 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...

    Started by parsec2011‎, 07-02-2013 12:58 PM
    2 Pages
    1 2
    binary, likert, logistic, logit, polychoric correlation
    • Replies: 18
    • Views: 7,228
    07-08-2013, 11:38 AM Go to last post
  52. 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). ...

    Started by ssbk‎, 11-20-2014 04:25 AM
    factor analysis, price testing, principal component, principal components
    • Replies: 0
    • Views: 1,823
    11-20-2014, 04:25 AM Go to last post
  53. 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...

    Started by mkobren‎, 03-14-2013 08:09 AM
    • Replies: 0
    • Views: 1,201
    03-14-2013, 08:09 AM Go to last post
  54. 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...

    Started by gav‎, 01-16-2012 10:03 AM
    classification, factor scores, groups, pcp
    • Replies: 0
    • Views: 2,086
    01-16-2012, 10:03 AM Go to last post
  55. 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...

    Started by static‎, 10-10-2011 10:46 PM
    • Replies: 3
    • Views: 6,046
    10-12-2011, 02:49 AM Go to last post
  56. 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...

    Started by skyakash‎, 03-17-2016 12:03 PM
    anova, crd, design of experiments, factorial analysis, unequal replications
    • Replies: 3
    • Views: 1,521
    03-18-2016, 06:59 AM Go to last post
  57. 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...

    Started by Pepper_Plant‎, 03-02-2016 02:38 PM
    confidence intervals, multiple comparisons
    • Replies: 2
    • Views: 1,204
    03-03-2016, 09:09 AM Go to last post
  58. 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...

    Started by mathilde‎, 12-16-2010 03:25 PM
    • Replies: 1
    • Views: 3,220
    05-08-2013, 02:24 AM Go to last post
  59. 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...

    Started by trinker‎, 04-28-2015 01:07 PM
    3 Pages
    1 2 3
    • Replies: 31
    • Views: 4,580
    04-28-2015, 09:25 PM Go to last post
  60. 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...

    Started by Mastauser‎, 10-02-2017 07:55 AM
    • Replies: 0
    • Views: 115
    10-02-2017, 07:55 AM Go to last post

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