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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: 18,796
    10-11-2014, 12:02 PM Go to last post
  1. Bayesian updating or...?

    Hi There, I'm new to this forum and also not an experienced statistician but I have a question. In my research I'm facing a problem that...

    Started by Bas van Dijk‎, 04-18-2012 10:18 AM
    • Replies: 0
    • Views: 1,283
    04-18-2012, 10:18 AM Go to last post
  2. Bayesian Variable Transformation (solve for PDF)

    Hi I'm struggling with where to start for this variable transformation problem. X~Bin(N,p) so that p(X=x) = (N choose x) * (p^x) * (1-p)^(N-x) ...

    Started by Dwaffle‎, 09-13-2011 08:59 PM
    • Replies: 2
    • Views: 2,203
    09-14-2011, 06:11 PM Go to last post
  3. Bayesian vs. Frequentist for the applied researcher

    There's been a lot of talk about Bayes lately in my life, talkstats, class, articles etc. I feel like it's becoming something researchers can't hide...

    Started by trinker‎, 11-25-2012 07:57 PM
    • Replies: 2
    • Views: 1,802
    11-26-2012, 07:30 PM Go to last post
  4. Bayesian: Defining priors from *same* data set you're modeling

    I believe that it is inappropriate to define prior distributions based on the same data you will be analyzing with those priors. In other words, the...

    Started by BayesianGirl‎, 09-22-2011 02:12 PM
    bayes, bayesian, bayesian inference, prior
    • Replies: 1
    • Views: 2,538
    09-22-2011, 07:47 PM Go to last post
  5. beating the rules at discrete sampling

    hi, I am looking at the question of how to sample rare occurances, like a rare defect in a manufacturing line. If I use the standard sample size...

    Started by rogojel‎, 06-10-2015 01:32 PM
    discrete data, proportions sample size
    • Replies: 4
    • Views: 2,724
    06-11-2015, 02:42 AM Go to last post
  6. Before/after surgery comparison

    Hi! I am currently doing experiments on song birds looking at pre- and post surgery data. I have 10 male birds each singing at least 100 songs both...

    Started by denstat‎, 01-22-2014 09:43 AM
    • Replies: 7
    • Views: 1,450
    02-04-2014, 09:20 AM Go to last post
  7. Post Beginner Statistics for Repeatability/Reproducibility

    Hi all, I'm new to this forum and seeking help regarding stats for a research project. My stats background is minimal (one college level class)...

    Started by microbegirl77‎, 04-12-2012 08:50 PM
    • Replies: 0
    • Views: 1,038
    04-12-2012, 08:50 PM Go to last post
  8. bell curve question

    I have data distributed unevenly on both side of the average.How do I go about normalizing the data so that it makes a perfect curve? I don't have a...

    Started by cpp_coder‎, 05-26-2008 01:49 PM
    • Replies: 10
    • Views: 6,640
    05-30-2008, 10:15 AM Go to last post
  9. Best Approach

    Hi, I am looking to analyse a data set consisting of one dependent variable - respondent satisfaction values ranging from 1 to 10 - with three...

    Started by cockett7‎, 02-22-2011 06:42 PM
    • Replies: 2
    • Views: 2,459
    02-23-2011, 11:38 AM Go to last post
  10. Best design for this experiment?

    Hello all. I am having some trouble with my experiment and would be the best way to analyze the data. I have 4 different chemicals each at one...

    Started by daelve‎, 08-25-2011 07:08 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 4,922
    08-26-2011, 04:55 PM Go to last post
  11. Post Best factor analysis settings in SPSS ?

    Hello Where i can get the best setting for factor analysis in spss for descriptives, extractions, rotations, scores, and options. I dont mind...

    Started by hanialbarni‎, 11-24-2014 06:31 AM
    • Replies: 1
    • Views: 1,991
    11-24-2014, 11:17 AM Go to last post
  12. Best method for analysing repeated measures data to show correlation

    Hello Thanks in advance for you help. I am currently conducting an experiment and would like to get opinions on the best way to go about...

    Started by cbranje‎, 05-23-2013 09:43 AM
    repeated measures
    • Replies: 0
    • Views: 1,147
    05-23-2013, 09:43 AM Go to last post
  13. Question Best method to analyze mediation and moderation with ordinal data?

    Hello! I'm new here (and to statistics as well). I could use your advice about how to analyze the data for my master thesis. The first part of...

    Started by delyangrozdev‎, 05-24-2013 04:32 AM
    • Replies: 7
    • Views: 6,376
    05-24-2013, 11:26 AM Go to last post
  14. Best Method to Calculate P-Values for These Data?

    Hello. I am a first year chemistry Ph.D. student with very little statistics experience. I am working with biophysical data, performing statistical...

    Started by katherynpenrod‎, 08-07-2014 08:33 AM
    • Replies: 2
    • Views: 1,579
    08-10-2014, 11:17 AM Go to last post
  15. Best Methodology for Solving for a Dummy Variable

    Hi everyone. This is my first post on the forum and unfortunately is an act of frustration after reading many articles and textbook sections without...

    Started by tuneman1980‎, 12-31-2015 10:44 AM
    • Replies: 1
    • Views: 1,088
    12-31-2015, 11:26 AM Go to last post
  16. best presentation of data to aid analysis

    Hello, I need some help with formulating a methodology for my current dissertation. I am investigating the impact of ability setting on students....

    Started by Gemstar‎, 03-12-2009 02:02 AM
    • Replies: 0
    • Views: 2,198
    03-12-2009, 02:02 AM Go to last post
  17. Best rating scale to use for my research?

    Don't worry about it.

    Started by liverpool‎, 11-10-2012 11:14 PM
    • Replies: 0
    • Views: 1,024
    11-10-2012, 11:14 PM Go to last post
  18. Best Stat Question Ever?

    Got this off Twitter (@galka_max) and found it interesting: If you choose an answer to this question at random, what is the chance you will get it...

    Started by The Game‎, 06-20-2017 09:42 PM
    • Replies: 8
    • Views: 909
    09-06-2017, 01:14 AM Go to last post
  19. Best statistical analysis to use for my research (ANOVA or other correlation test)

    Greetings! I am new in this forum and I have very little knowledge in statistics. I have a research about air pollution. I get samples of air...

    Started by statisticsjn‎, 10-19-2012 06:25 AM
    anova, correlation, statistical method
    • Replies: 0
    • Views: 1,634
    10-19-2012, 06:25 AM Go to last post
  20. Best Statistical Test for small sample size

    I am looking at changes in endotracheal tube cuff pressures pre and post subglottic suctioning. I have pre and post data for four different initial...

    Started by mrobert6‎, 05-28-2013 12:07 PM
    pre and post
    • Replies: 2
    • Views: 1,816
    06-26-2013, 09:11 AM Go to last post
  21. Question Best suited forecasting method for forecasting of sales of truck/tractors?

    Best suited forecasting method for forecasting of sales of truck/tractors? The constraints for forecasting are 1.The sale figures of trucks do not...

    Started by Wordsworth‎, 05-23-2012 10:06 AM
    • Replies: 0
    • Views: 1,224
    05-23-2012, 10:06 AM Go to last post
  22. Best test to use?

    Hi Everyone, I am trying to design a medical study and having difficult for teh best to use, in summary: Stage 1: Patients are classified into...

    Started by amanco‎, 09-15-2011 06:02 PM
    • Replies: 0
    • Views: 1,640
    09-15-2011, 06:02 PM Go to last post
  23. Best tool to analyse data

    Hi, I have 20 years of data about calibration reports of various clients which primarily shows three-variables. COMPANY A YEAR 2001 1.)...

    Started by fahm‎, 06-21-2017 05:16 AM
    • Replies: 1
    • Views: 493
    06-21-2017, 10:59 AM Go to last post
  24. best way to create ANOVA groups from a range of scores?

    Hello Everyone, I have been involved in a discussion with my Experimental Methods of Psychology Instructor about the best way to divide a range of...

    Started by Patrick Turbiville‎, 09-23-2011 03:21 PM
    • Replies: 5
    • Views: 2,964
    09-24-2011, 04:46 AM Go to last post
  25. best way to use Cronbach's alpha?

    I am making my first foray into survey based research. A quick question or two about Cronbach's alpha: My survey included questions about...

    Started by student's t top‎, 06-07-2010 02:22 PM
    • Replies: 1
    • Views: 6,750
    06-07-2010, 03:55 PM Go to last post
  26. Beta error

    Hey guys I really need help from you to calculate the beta error of two different samples. The values are: Average rate of the first sample:...

    Started by Heisenberg‎, 12-09-2013 09:08 AM
    • Replies: 0
    • Views: 696
    12-09-2013, 09:08 AM Go to last post
  27. Between-Group and Within-Group PCA

    Hi all, I'm running a PCA with two species (one fossil and one extant) divided into multiple geographic groups. The program I'm using is called...

    Started by osteomatrix‎, 03-16-2013 08:28 PM
    between-group, pca, principal components, principle component, scatterplot
    • Replies: 0
    • Views: 2,418
    03-16-2013, 08:28 PM Go to last post
  28. BH, why this threshold ?

    Hello, I have a theoretic question. When using the BH procedure for controlling the false discovery rate, we compare the p values in this way: ...

    Started by NN_STAT‎, 07-29-2012 09:43 AM
    • Replies: 1
    • Views: 1,446
    08-02-2012, 06:01 PM Go to last post
  29. Bhattacharyya metric as a chi-squared type statistic

    Hi all, I'm reading about the relation between the Bhattacharyya metric and the chi-squared metric:...

    Started by snufkin‎, 08-21-2016 05:47 PM
    • Replies: 0
    • Views: 732
    08-21-2016, 05:47 PM Go to last post
  30. bias of the coefficient of variation

    Is the coefficient of variation biased? How would you compute the bias of CV? Can I write E(sigma_hat/|mu_hat|) = E(sigma_hat)E(1/|mu_hat|)+ ...

    Started by zzzc‎, 03-30-2011 10:50 AM
    • Replies: 4
    • Views: 5,711
    03-30-2011, 02:38 PM Go to last post
  31. Post Bic

    I am a graduate student who wants to learn more about the Bayesian information criterion (BIC) for a project I am working on. What do you think is...

    Started by krjames1‎, 08-11-2011 09:51 PM
    • Replies: 0
    • Views: 1,604
    08-11-2011, 09:51 PM Go to last post
  32. Bigger sample size and less good results or smaller sample size but better results

    I hope this is the right place to post this question. I'm doing my thesis based upon the data of my professors research study. I want to look into...

    Started by Singalore‎, 04-02-2015 10:15 AM
    effect size, sample size
    • Replies: 0
    • Views: 1,539
    04-02-2015, 10:15 AM Go to last post
  33. binary choice with fisheries data over time

    Hi all, I am new to the forum so please bear with me if I am not following protocol in my post. I have fisheries data which is vessel specific....

    Started by senegale‎, 11-17-2015 03:31 PM
    • Replies: 4
    • Views: 1,498
    11-19-2015, 02:19 PM Go to last post
  34. binary forcasting

    Hello My data in a binary form a one-hour period for 90 days. 0=Not happened 1= happended I wanna to forcasting these data ,and i dont know what...

    Started by aminabdolahnejad‎, 02-16-2016 01:52 PM
    • Replies: 3
    • Views: 1,517
    02-20-2016, 03:08 PM Go to last post
  35. Binary logistic regression with no significant predictors

    Hi everyone, I have a question for logistic regression but i guess it applies to all kinds of regression analysis. I have a model with many...

    Started by micdhack‎, 05-11-2012 06:16 AM
    • Replies: 3
    • Views: 11,254
    05-19-2012, 06:43 AM Go to last post
  36. Binary Variable Split

    Hey everybody, Following problem: I did research and collected 207 responses. One of the results of the survey is a binary variable. Lets call the...

    Started by Lewh‎, 06-13-2013 09:19 AM
    • Replies: 0
    • Views: 1,092
    06-13-2013, 09:19 AM Go to last post
  37. Binning Question

    Hi everyone! For logistic regressions, is it ever ok to bin a continuous independent variable and then put both the continuous version and bins...

    Started by Oberon‎, 10-24-2013 04:17 PM
    • Replies: 0
    • Views: 1,080
    10-24-2013, 04:17 PM Go to last post
  38. Binomial Test that does not assume indepence? (using a repeated measures design)

    Hi, I am looking for a way to analyze data for the following experiment: subjects were presented with two separate acoustic signals at the same...

    Started by ochracea‎, 08-22-2009 10:23 PM
    • Replies: 1
    • Views: 2,691
    08-23-2009, 01:08 PM Go to last post
  39. Biology grad student needs help - Scorpion Data

    Hello, I am looking for help with PCA, and stuff like DFA and MANOVA. I study scorpions, and as part of my research I have used genetic methods...

    Started by mattrgraham‎, 02-14-2011 10:24 PM
    • Replies: 1
    • Views: 2,993
    02-15-2011, 04:11 AM Go to last post
  40. Bivariate Contour Ellipse Area

    I have found a research paper, where there is need to calculate the area of a bivariate contour ellipse. I am familiar with drawing a confidence...

    Started by m1chael‎, 07-21-2016 07:25 AM
    • Replies: 0
    • Views: 3,582
    07-21-2016, 07:25 AM Go to last post
  41. Blocked ANOVA: unequal amount of data for the different blocks?

    Hi guys, So I'm conducting an experiment where I'm using a blocked ANOVA and have a few questions about my data set. I'm looking at the abundance...

    Started by srpang89‎, 04-28-2015 08:15 PM
    • Replies: 0
    • Views: 1,207
    04-28-2015, 08:15 PM Go to last post
  42. BLUP of a specific difference is biased

    Can anyone explain how BLUPs can be unbiased but the BLUP of of a difference is biased. I have found this statement in numerous papers eg Smith,...

    Started by emily.stats‎, 09-04-2013 07:45 AM
    • Replies: 1
    • Views: 1,194
    09-05-2013, 04:32 AM Go to last post
  43. BMA (Bayesian Model Averaging ) or a classic fixed effects macro panel ?

    Hey folks I would like your opinion..So I need to decide between a BMA (Bayesian Model Averaging ) or a classic fixed effects macro panel in order to...

    Started by abc‎, 12-22-2013 01:55 PM
    • Replies: 0
    • Views: 1,037
    12-22-2013, 01:55 PM Go to last post
  44. Bonferroni correction (significance level and CI)

    Hi there, I need another advice. I'm dealing with the problem of multiple testing and I was planning to use Bonferroni correction. Because I...

    Started by Jeremiah‎, 07-14-2016 05:38 AM
    • Replies: 1
    • Views: 2,012
    07-14-2016, 07:53 AM Go to last post
  45. Bonferroni Correction Factor !!!

    Hello, What exactly Bonferroni correction factor means? Why we calculate it in our study? Thanks, Bala

    Started by Bala‎, 09-26-2008 02:44 AM
    • Replies: 9
    • Views: 25,798
    07-14-2009, 06:33 AM Go to last post
  46. Bonferroni correction in multiple linear regressions: HELP NEEDED

    Hi, I'm running the following regression in R for 16000 promotors and one Phenotype (let's say Systolic Blood Pressure, RR_sys): lm (RR_sys ~...

    Started by capocrimini‎, 12-14-2013 08:01 AM
    • Replies: 0
    • Views: 2,606
    12-14-2013, 08:01 AM Go to last post
  47. Bonferroni-Holm adjustment

    I have sort of a weird question. I am reading a journal article and basically the authors used a Kruskal-Wallis test to compare the median values of...

    Started by lancearmstrong1313‎, 01-30-2012 02:31 PM
    • Replies: 2
    • Views: 2,984
    01-31-2012, 01:18 PM Go to last post
  48. Book for Applied Panel Data Analysis

    Hello, I am looking for a book with the topic applied panel data analysis. I already had a look on these ones: ANALYZING PANEL DATA (P) This...

    Started by consuli1‎, 10-03-2013 10:43 AM
    • Replies: 0
    • Views: 1,235
    10-03-2013, 10:43 AM Go to last post
  49. bootstrap and non-stationarity

    Dear all, Is it true to say: If a time series X(t) does not satisfy the strict stationarity condition: P(X(t+1), X(t+2), ... , X(t+T)) =/=...

    Started by resetzero‎, 11-03-2009 02:06 PM
    • Replies: 0
    • Views: 2,566
    11-03-2009, 02:06 PM Go to last post
  50. Bootstrap bias

    Good day forum, I'm using a bootstrap approach to get a better understanding of a sampling distribution. I've heard that the bootstrap approach...

    Started by chippy‎, 11-05-2012 01:49 PM
    bias, bootstrap, sampling distribution
    • Replies: 0
    • Views: 1,156
    11-05-2012, 01:49 PM Go to last post
  51. Bootstrap for estimating parameters...

    Hi. Let say we have only one original sample in which we are interested only on one statistics c of this sample, e.g. median. And let say we want...

    Started by tsukiko‎, 03-01-2011 11:03 PM
    • Replies: 0
    • Views: 1,740
    03-01-2011, 11:03 PM Go to last post
  52. Bootstrap Spearman coeff.: intepreting results

    Hi! I would very appreciate if someone can kindly provide some hints on the following issue. I am interested in the correlation between two...

    Started by gianmarco‎, 11-09-2010 11:29 AM
    • Replies: 6
    • Views: 9,751
    11-14-2010, 07:02 AM Go to last post
  53. Bootstrapping Dependent Data

    Is there any bootstrapping procedure for dependent data which is not based on any specific model?

    Started by tsukiko‎, 03-16-2011 07:49 PM
    • Replies: 2
    • Views: 2,193
    03-16-2011, 10:03 PM Go to last post
  54. bounded pareto distribution

    please any one can help me about the inversion method that is used to form a bounded pareto I can't understand the inversion method that is used in...

    Started by batooool‎, 12-17-2014 09:49 AM
    • Replies: 1
    • Views: 2,142
    12-20-2014, 04:25 PM Go to last post
  55. bounds of beta distributions

    I'd like to estimate the lower and upper bounds of a general beta distribution, using 5 and 95 percentiles. I already know how to estimate the mean...

    Started by cem48105‎, 08-20-2009 11:20 AM
    • Replies: 0
    • Views: 2,153
    08-20-2009, 11:20 AM Go to last post
  56. Box's Test after outlier Removal

    Hello everyone, I have searched the forum and couldn't find an answer, so I figured I would start a new thread. I am running a 1-way MANOVA for...

    Started by dvtolusso‎, 08-02-2016 01:58 PM
    • Replies: 0
    • Views: 1,262
    08-02-2016, 01:58 PM Go to last post
  57. Boxplot

    Hi All, Can someone please help me to clearly explain this box plot in the attached file ? Thanks in advance

    Started by Sisi‎, 05-07-2012 04:01 AM
    • Replies: 3
    • Views: 1,445
    05-09-2012, 03:33 PM Go to last post
  58. Bracket Medians

    Hi Guys, I really need your help. I have to determined a Bracket Medians using a table having two columns: 1) number of knils, 2) percentage of...

    Started by Nunzia‎, 07-07-2015 03:11 PM
    • Replies: 0
    • Views: 1,205
    07-07-2015, 03:11 PM Go to last post
  59. Bradley-Terry model and the difference between football goals?

    Hi everyone ! I'm actually working on the Bradley-Terry model, and I cannot find any answer for my problem... Perhaps you can help me ?! The...

    Started by malymalone‎, 01-18-2012 01:08 PM
    • Replies: 0
    • Views: 1,542
    01-18-2012, 01:08 PM Go to last post
  60. breaking data into training and testing (hold-out) sets

    Dear Stats Forum, I am a grad student with an introductory stats background. For my research, I'm conducting an experiment to compare the predictive...

    Started by hollywas‎, 07-21-2012 01:30 PM
    • Replies: 3
    • Views: 2,744
    07-21-2012, 04:47 PM Go to last post

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