1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,784
+ Post New Thread
Page 12 of 54 FirstFirst 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 ... LastLast
Threads 661 to 720 of 3193

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: 18,638
    10-11-2014, 12:02 PM Go to last post
  1. 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: 3,523
    07-21-2016, 07:25 AM Go to last post
  2. Which statistical test shall I use please? Thanks a lot

    Hi I am trying to compare 2 groups- one that has had surgery on the same leg (37) vs opposite leg (48) and to compare whether there is any...

    Started by saral123123‎, 12-28-2016 04:08 PM
    • Replies: 3
    • Views: 3,523
    12-29-2016, 08:42 AM Go to last post
  3. Choosing prior for beta and normal random variables

    Hi, I need to choose 1) a prior distribution for the mean and variance of a normal random variable. 2) a prior distribution for the shape...

    Started by panbalag‎, 01-14-2011 10:18 AM
    • Replies: 1
    • Views: 3,521
    01-14-2011, 10:31 AM Go to last post
  4. non-parametric t-test with mean/SD = 0

    Hi All, quick question on non-parametric t-test I have 2 groups. 7 values each. Group One= 0, 0, 0, 0, 0, 0, 0 which of course is mean=0 and...

    Started by Misagh‎, 02-04-2013 04:20 PM
    non-parametric, sem
    • Replies: 5
    • Views: 3,520
    02-05-2013, 11:24 PM Go to last post
  5. Low population hypothesis testing

    Hi, I'm doing statistics for a friend of mine. Problem with the data is that there are only 64 responses. Questionnaire was distributed to a...

    Started by aretai‎, 11-10-2010 07:45 AM
    • Replies: 4
    • Views: 3,516
    11-16-2010, 06:28 AM Go to last post
  6. Categorical data goodness of fit question

    Hello, I am trying to fit a log linear model with proc genmod and when i include all interactions (3 variables) i get the following: Criterion...

    Started by szm‎, 02-21-2012 04:12 PM
    categorical data analysis, chi square, deviance, genmod, log linear
    • Replies: 6
    • Views: 3,515
    02-21-2012, 06:20 PM Go to last post
  7. Anova without intercept?

    Is it possible to perform Anova without an intercept? In the software, there is an option to check the box that says “no intercept”. Once I do...

    Started by elad83‎, 10-31-2016 01:55 PM
    anova, anova intercept
    • Replies: 3
    • Views: 3,515
    10-31-2016, 03:02 PM Go to last post
  8. Possible stats tests to use?

    Hi, After racking my brain not knowing what to do with my data I thought I'd give it a shot and post here, as I'm still unsure what I can do to...

    Started by Seethelios‎, 10-12-2014 05:50 PM
    biology, lifespan, movement, non-parameteric, survival
    • Replies: 1
    • Views: 3,510
    10-13-2014, 05:19 AM Go to last post
  9. Question Testing the inter-rater reliability when data doesn't have a normal distribution

    Hello guys! What is a standard way of testing the inter-rater reliability when data doesn't have a normal distribution? I had a bunch of raters...

    Started by gvadalkivir‎, 12-08-2010 10:42 PM
    • Replies: 0
    • Views: 3,509
    12-08-2010, 10:42 PM Go to last post
  10. Football(Soccer) Betting Model Inference

    Please sorry for reposting, I had a problem with my pictures in post, they were stored on my computer. I think it's better to attach them to the...

    Started by Valen‎, 01-07-2011 03:12 AM
    • Replies: 0
    • Views: 3,509
    01-07-2011, 03:12 AM Go to last post
  11. Within Subjects OXO and confounds

    Greetings! I'm helping a friend in the medical field with his research and I have an I/O Psych background - meaning lots of regression and...

    Started by IOPsy‎, 06-11-2009 11:57 AM
    • Replies: 1
    • Views: 3,496
    07-19-2009, 09:33 PM Go to last post
  12. Help w/survey results!

    I am hoping someone can help me figure out how to do the following: I am a member of my child's school's accountability committee, and as such we...

    Started by astro_girl‎, 04-07-2011 07:18 PM
    • Replies: 4
    • Views: 3,494
    04-08-2011, 04:05 PM Go to last post
  13. Introduction for Observational Study on Red Cars

    This is the Introduction for my stats project on red cars vs. speeding tickets received. Let me know what changes to make, and how the intro is....

    Started by Thanasi‎, 06-13-2010 09:01 AM
    • Replies: 0
    • Views: 3,493
    06-13-2010, 09:01 AM Go to last post
  14. When are random variables random?

    I have an environmental dataset in which a treatment was carried out on a series of plots (situated on the landscape) in duplicate. However the...

    Started by jdmac11‎, 11-26-2008 09:34 AM
    • Replies: 0
    • Views: 3,487
    11-26-2008, 09:34 AM Go to last post
  15. About the distribution of confidence interval for Weibull

    Does anyone have an idea about the distribution of the 95% confidence intervals for a population with a Weibull distribution? Thanks in advance!

    Started by ppmovie‎, 03-23-2009 06:18 PM
    • Replies: 0
    • Views: 3,486
    03-23-2009, 06:18 PM Go to last post
  16. Article on logistic regression - don't understand logic of statement.

    The author Menard, has written a good deal on this topic and this is from a recent (2011) journal article. This makes sense. But I don't...

    Started by noetsi‎, 06-25-2013 01:54 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 3,484
    06-26-2013, 11:44 AM Go to last post
  17. Intermediate outcomes: use as predictors in logistic regression, or use Naive Bayes?

    I am predicting whether or not someone will receive a grant from an agency (dichotomous outcome). I have generated a model that uses various...

    Started by bernoulli‎, 12-08-2010 03:45 PM
    • Replies: 0
    • Views: 3,479
    12-08-2010, 03:45 PM Go to last post
  18. Need help to test the significance

    I want to make a test to see if the difference is significant or not. What I have is two different groups of values (one with 31 values and the other...

    Started by Lisa A‎, 03-29-2011 04:21 AM
    p-value, significance, ttest, ttest in excel
    • Replies: 5
    • Views: 3,477
    04-07-2011, 07:38 PM Go to last post
  19. P Value...should I trust it ?

    Hello, I am trying to detect significant differences in response of some device, among two groups: healthy and sick people. I ran a t-test,...

    Started by NN_STAT‎, 07-28-2011 02:00 AM
    • Replies: 7
    • Views: 3,477
    07-28-2011, 10:47 AM Go to last post
  20. test which of two models is better predictor -- but the two are correlated with each

    Dear All -- Can anyone please please help me? I have a dichotomous dependent variable Y There are two alternative models for predicting Y The...

    Started by dbodoff‎, 06-22-2011 09:45 PM
    • Replies: 6
    • Views: 3,476
    09-02-2011, 06:46 PM Go to last post
  21. Smile reliability and pilot testing...losing plot!

    Hi All I have modified an exisiting survey, added more questions. I have two separate scaleswithin this measuring different constructs, the rest...

    Started by Deborah Redmond‎, 12-06-2011 11:58 PM
    • Replies: 8
    • Views: 3,466
    12-08-2011, 03:19 PM Go to last post
  22. Strange likelihood function

    I have seen multiple instances where a strange negative log-likelihood function is used either to describe the posterior distribution of a model fit...

    Started by ErinFish‎, 07-28-2010 01:03 PM
    • Replies: 2
    • Views: 3,453
    08-04-2010, 01:34 PM Go to last post
  23. how to determine the sample size needed for logit model

    how to determine the sample size needed for logit model? we are currently working on a thesis.

    Started by Anthny Garc‎, 08-02-2011 01:46 AM
    • Replies: 1
    • Views: 3,447
    08-03-2011, 12:12 AM Go to last post
  24. Weighting survey answers - different approaches

    Hej! I've quite recently changed job moving both to another country and from private to public sector. I have both before and currently worked as...

    Started by m66‎, 08-24-2010 05:09 PM
    • Replies: 1
    • Views: 3,445
    10-17-2010, 01:36 PM Go to last post
  25. Durbin-Watson statistics - autocorrelation

    If the Durbin-Watson statistics for the OLS regression was 2.268, does it suggest that there is no autocorrelation among residuals since d is near 2?...

    Started by eunkum‎, 03-21-2013 10:25 AM
    • Replies: 4
    • Views: 3,443
    03-21-2013, 04:01 PM Go to last post
  26. Alternatives for Non-normality and Inequality of Variance?

    I've been working with a rather difficult data set for over a week with no real progress. I am trying to compare the effect of temperature (15, 20,...

    Started by nebulus‎, 03-17-2017 11:04 PM
    2 Pages
    1 2
    • Replies: 16
    • Views: 3,440
    03-22-2017, 07:22 AM Go to last post
  27. PLS-DA: Are latent variables comparative?

    Hello, first post on the forum - hopefully this is the correct place to do this. I've been working on developing an system for visualising the...

    Started by martinfitzp‎, 05-25-2012 05:30 AM
    • Replies: 2
    • Views: 3,433
    05-27-2012, 07:40 PM Go to last post
  28. Describing a curve in order to compare with species abundance

    Hi, I was wondering if there was an established method / algorithm for describing a curve (in this case, grain-size data) in order to compare...

    Started by nicknara25‎, 04-11-2008 05:31 AM
    • Replies: 0
    • Views: 3,432
    04-11-2008, 05:31 AM Go to last post
  29. Multivariate Analysis assistance needed

    I have conducted a survey on online privacy sensitivity. Part of the survey used a previously-proven instrument to generate a Privacy Sensitivity...

    Started by bclifford‎, 10-14-2008 02:19 PM
    • Replies: 4
    • Views: 3,432
    10-14-2008, 07:42 PM Go to last post
  30. non parametric multiple comparison

    Hello I am doing statistical analysis on my research data and the data is not normal. So I used Kruskal Wallis test for finding whether treatments...

    Started by rzs0034‎, 09-22-2014 11:08 AM
    • Replies: 3
    • Views: 3,431
    09-23-2014, 01:27 AM Go to last post
  31. Statistical Research Question

    Here is what I am looking at: I want to know how 3 factors (we'll call them A1, A2, A3) correlate with Store Sales per Store (532 stores). In...

    Started by vanna‎, 01-21-2009 12:38 PM
    • Replies: 3
    • Views: 3,428
    01-22-2009, 02:09 AM Go to last post
  32. CFA using AMOS: Poor model fit for an instrument

    Hi everyone, I'm conducting CFA using AMOS to evaluate the structure of an instrument. The following models are specified and evaluated: Model...

    Started by Star7‎, 10-25-2013 07:27 AM
    • Replies: 3
    • Views: 3,423
    10-25-2013, 06:10 PM Go to last post
  33. Violation?: Comparing group mean to population mean

    Greetings! I was hoping you guys could help me out with a problem. Im curious to know how one would go about attacking a problem like this. I...

    Started by Doodnauth‎, 11-09-2012 08:42 AM
    • Replies: 0
    • Views: 3,422
    11-09-2012, 08:42 AM Go to last post
  34. it is must to include include ANOVA results in specified format

    Hi. My thesis has calculations that uses one-way ANOVA.There are 40 dependent variables which are needed to be compared under 14 independent...

    Started by addikted‎, 11-19-2016 03:19 AM
    • Replies: 0
    • Views: 3,421
    11-19-2016, 03:19 AM Go to last post
  35. Fisher's exact test, Hypergeometric distribution

    Hi, I need some help with Fisher's exact test and the hypergeometric distribution My data consists of: 500 mutations - that I want to score as...

    Started by AnnaS‎, 04-24-2012 08:19 AM
    fisher's exact test, hypergeometric
    • Replies: 0
    • Views: 3,415
    04-24-2012, 08:19 AM Go to last post
  36. Question repeated measures t-test question - Help!

    Hi, I have measured various parameters (for example heart rate) in two groups (control and treated) over a time course of 45 minutes, taking...

    Started by Nibbler‎, 05-22-2009 04:21 AM
    • Replies: 1
    • Views: 3,414
    05-22-2009, 10:05 AM Go to last post
  37. What statistic to use?

    I am reviewing the statistics we currently use at work to ensure that we are using the correct statistics. The scenario is: a. We produce...

    Started by elisayoung‎, 04-27-2009 07:19 PM
    • Replies: 1
    • Views: 3,409
    04-28-2009, 01:13 AM Go to last post
  38. Statistical Independence

    I'm trying to give my students a brief introduction to chi-square testing, but there's something that's a little confusing to me regarding the...

    Started by alphaqn69‎, 04-08-2011 04:38 PM
    • Replies: 1
    • Views: 3,408
    04-27-2011, 11:02 PM Go to last post
  39. Non normal distributed Statistical Test

    I am doing Statistical test between independent variable vs dependent variable Independent : Numeric Data - eg: Age (5,6,78,19) Dependent :...

    Started by studentdoctor‎, 03-16-2011 09:56 AM
    • Replies: 1
    • Views: 3,406
    03-16-2011, 10:54 AM Go to last post
  40. 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...

    Started by JEHP1846‎, 03-19-2010 04:49 PM
    • Replies: 2
    • Views: 3,404
    03-19-2010, 06:31 PM Go to last post
  41. Question attributes of individuals in discrete choice tasks

    Hello stat talkers, :wave: I'm currently working on a marketing (discrete choice) project concerning brand choice and I stumbled upon some questions...

    Started by alex.wendland‎, 11-16-2009 05:08 AM
    • Replies: 3
    • Views: 3,403
    11-23-2009, 04:23 AM Go to last post
  42. What is a monte carlo simulation?

    I am doing some research and think I am doing a monte carlo simulation. Could some body please tell me what that is? If someone could also tell me...

    Started by brad henrie‎, 10-22-2009 08:24 PM
    • Replies: 1
    • Views: 3,402
    10-22-2009, 08:53 PM Go to last post
  43. Two-dimensional outlier detection

    Hi all, I was wondering if you could give me some suggestions to detect two-dimensional outliers, i.e. for values depending on the variables. A...

    Started by bontus‎, 01-19-2012 10:39 AM
    outlier detection, two-dimensional
    • Replies: 1
    • Views: 3,396
    01-19-2012, 01:06 PM Go to last post
  44. Mann-Whitney U Test for non random sample

    Hi I've got too groups Success and Failure I've got four sample populations in different industries that i've ranked by a measure of success. ...

    Started by arobbo‎, 01-19-2011 01:10 PM
    • Replies: 2
    • Views: 3,390
    01-20-2011, 03:31 AM Go to last post
  45. Parametric t-tests for individual / portfolio stock returns

    Hello everyone, I am relatively rookie with statistical tests and I am trying to perform a parametric t-test for stock returns as follows. I have...

    Started by hensor89‎, 12-20-2016 05:48 PM
    • Replies: 2
    • Views: 3,387
    12-21-2016, 10:22 AM Go to last post
  46. muscle strength gain vs. time vs. age

    Anyone have data from longitudinal studies on this? 1% per week seems like a reasonable initial value. Thanks.

    Started by Outlier‎, 08-15-2010 04:24 PM
    • Replies: 0
    • Views: 3,378
    08-15-2010, 04:24 PM Go to last post
  47. t test using diversity index

    So, I am trying to perform a t-test using diversity indexes, but the biostat book I am using is a little bit confusing. the calculated t value =...

    Started by agarcin‎, 07-23-2010 08:49 PM
    • Replies: 0
    • Views: 3,376
    07-23-2010, 08:49 PM Go to last post
  48. power of Krusal-wallis test when normality doesn hold

    pvalue = rep(NA, 1000) # repeat 1000 times pvaluekw = rep(NA, 1000) n = rep(25, 3) group = rep(1:3, n) for (i in 1:1000){ x1 <- rt(25,df=3)...

    Started by xixihaha‎, 03-07-2011 08:36 AM
    • Replies: 1
    • Views: 3,373
    03-07-2011, 10:32 AM Go to last post
  49. statistical analysis- ANOVA, t test, questionnaire

    Hi all, I am doing a mini research in HCI filed which examine the differences between pen touch and finger touch on specific Smartphone. I have...

    Started by hila‎, 02-02-2013 10:49 AM
    • Replies: 5
    • Views: 3,370
    02-04-2013, 04:44 PM Go to last post
  50. Cluster analysis vs multicolinearity

    Hi you all, I hope you can help me with this following problem: 1. I've runned an factor analysis on my data for fifteen "need" items for sugar...

    Started by Tom Meulders‎, 10-17-2011 06:40 AM
    cluster analysis, data reduction, mahalanobis, multicollinearity
    • Replies: 0
    • Views: 3,367
    10-17-2011, 06:40 AM Go to last post
  51. simultanoues equations for panel data

    I want to estimate a simultaneous equations model in which each structural equation has a panel data structure. how to do it? Stata doesn't have a...

    Started by loukil‎, 07-14-2008 07:46 AM
    • Replies: 0
    • Views: 3,364
    07-14-2008, 07:46 AM Go to last post
  52. Instrumental Variable?

    So i have a bunch of variables: religious beliefs (how religious you are) and religious participation (how often you go to church), and demographic...

    Started by svalik‎, 12-09-2008 12:12 PM
    • Replies: 1
    • Views: 3,364
    12-17-2008, 01:24 AM Go to last post
  53. 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...

    Started by bomme‎, 11-20-2010 10:20 AM
    • Replies: 0
    • Views: 3,361
    11-20-2010, 10:20 AM Go to last post
  54. Volume of confidence intervals for Multinomial distributions

    Hi, I'd like to know the formula for calculating the volume of the confidence (rectangular) region for the multinomial distribution. I've already...

    Started by cyb3r.dani‎, 11-09-2010 09:50 AM
    • Replies: 0
    • Views: 3,359
    11-09-2010, 09:50 AM Go to last post
  55. Thumbs up Unweighted population vs weighted population

    Hi everyone, I have a dilemma of trying to find how to best read a data. Here is a sample of my data, the question is how frequent do you buy a...

    Started by grue‎, 09-25-2013 10:23 PM
    • Replies: 2
    • Views: 3,359
    10-10-2013, 09:56 PM Go to last post
  56. Question problem of finding MLE

    consider a sample X_1,X_2,.....,X_n the pdf given by f(x) = \frac{1}{\mu}e^-\frac{x-\mu}{\mu} , x>\mu, \mu>0 what is the MLE of \mu? ...

    Started by Sambit‎, 11-18-2010 08:12 AM
    • Replies: 4
    • Views: 3,358
    11-19-2010, 11:03 AM Go to last post
  57. Question Relative risk

    Can anyone help me with this? I have two variables: 1) Immune suppression 2) Air space disease. Of the patients with NO immune suppression...

    Started by Vicci‎, 01-16-2011 01:45 PM
    • Replies: 0
    • Views: 3,356
    01-16-2011, 01:45 PM Go to last post
  58. Difference needed for power in fixed population.

    Hi, I am designing a study to examine the difference made by implementing a new treatment strategy for a medical condition. I have become a...

    Started by schisms‎, 03-23-2011 05:38 AM
    power, significance
    • Replies: 7
    • Views: 3,355
    03-25-2011, 12:34 PM Go to last post
  59. concordance of two sets of data

    here is my problem: for a set of genes i have an expected(predicted) phenotype and an observed phenotype. i need prove that the level of...

    Started by anjan_purkayastha‎, 10-13-2008 12:29 PM
    • Replies: 0
    • Views: 3,352
    10-13-2008, 12:29 PM Go to last post
  60. Panel Data Fixed Effects with year dummies

    I wasn't sure quite were to put this thread, so I'm posting here even though it's very similar to another one I posted in another thread. Quick...

    Started by ewalcott‎, 03-19-2013 09:54 AM
    fixed effects, panel data
    • Replies: 0
    • Views: 3,349
    03-19-2013, 09:54 AM Go to last post

+ Post New Thread
Page 12 of 54 FirstFirst 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 ... LastLast

Thread Display Options

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.

Order threads in...

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

Icon Legend

Contains unread posts
Contains unread posts
Contains no unread posts
Contains no unread posts
More than 15 replies or 300 views
Hot thread with unread posts
More than 15 replies or 300 views
Hot thread with no unread posts
Closed Thread
Thread is closed
Thread Contains a Message Written By You
You have posted in this thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats