1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
+ Post New Thread
Page 30 of 54 FirstFirst ... 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 37 38 39 40 41 42 43 44 45 46 47 48 49 ... LastLast
Threads 1741 to 1800 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: 18,756
    10-11-2014, 12:02 PM Go to last post
  1. How to make inferences about a group based on test scores?

    Hi there, I would really appreciate any help. Here's my problem: I have two datasets: 1. I have an exam score (pretend is the GRE) for all...

    Started by rvalente‎, 10-09-2012 03:45 AM
    prvalue ologit inferences
    • Replies: 1
    • Views: 1,591
    10-12-2012, 03:29 AM Go to last post
  2. Thumbs up ANOVA, residual normality assumptions

    Hi everybody, I would like to ask you something about the normality hypotesis on the residuals when performing an ANOVA. Do I have to check the...

    Started by nelson85‎, 10-09-2012 06:25 AM
    anova, normality test, residuals
    • Replies: 0
    • Views: 1,815
    10-09-2012, 06:25 AM Go to last post
  3. t-test or Mann-Whitney test, regular research problem, need help

    Hello, it looks like a most frequent research problem, but I am confused, so need help. I have 2 groups of data to compare: group 1 - people...

    Started by bondsergey‎, 10-08-2012 08:30 AM
    • Replies: 6
    • Views: 12,017
    10-09-2012, 06:01 AM Go to last post
  4. Basic Statistics Question

    I have a distribution and the numbers are spread around all over the place. For one sample of data it looks like left skewed and for other right...

    Started by sak‎, 10-08-2012 07:56 PM
    • Replies: 2
    • Views: 2,397
    10-08-2012, 08:29 PM Go to last post
  5. Question Mediation Hypothesis

    Hi all, I am in desperate need of somebody who is familiar with bootstrapping in SPSS to test a mediation hypothesis. I have installed the...

    Started by richieboy‎, 10-06-2012 03:39 AM
    • Replies: 0
    • Views: 2,926
    10-06-2012, 03:39 AM Go to last post
  6. Business Research, Stratified Sampling and Data Analysis - Need Advice

    Dear Forum Members I need some advice on designing a statistical research for my dissertation. I hope I have posted my query in the right section....

    Started by GACL212003‎, 10-03-2012 01:28 AM
    • Replies: 1
    • Views: 1,306
    10-05-2012, 11:30 AM Go to last post
  7. Revised Inventory Reliability and Validity

    I sent a current inventory survey to 1500 people. They were given the option of evaluating each inventory item with a "retain" "revise" or "remove"...

    Started by paschif‎, 10-05-2012 09:45 AM
    • Replies: 2
    • Views: 1,425
    10-05-2012, 10:41 AM Go to last post
  8. Simple Bayesian problem, need help.

    I am trying to apply the Bayes theorem in a realistic example so that I can understand it better. I need your help to make sure that my logic is...

    Started by micdhack‎, 10-04-2012 04:28 AM
    • Replies: 0
    • Views: 1,247
    10-04-2012, 04:28 AM Go to last post
  9. Calculate SD from mean and 95% CI

    Dear Friends I'm reading a paper that has the following table: Year, n, measure (SD) 2008, 536 0.25 (0.13) 2010, 536 0.21...

    Started by SiBorg‎, 10-03-2012 03:58 PM
    • Replies: 7
    • Views: 4,615
    10-03-2012, 06:31 PM Go to last post
  10. Usefulness of pariwise comparisons

    Hello, Let's say you are running a 2x6 repeated measures ANOVA. You find a significant interaction, which is followed up by simple effects...

    Started by Shadow21‎, 10-03-2012 05:57 PM
    • Replies: 0
    • Views: 1,332
    10-03-2012, 05:57 PM Go to last post
  11. Underestimation of test scores due to item size

    Hello all, I've just been playing with the following idea, and I don't really have anyone else to talk about this kind of thing with. Anyway, I...

    Started by Rhodo‎, 10-02-2012 11:36 AM
    • Replies: 2
    • Views: 1,617
    10-02-2012, 02:15 PM Go to last post
  12. data analysis for likert scale

    i have a group of variables being measured on a likert scale from 1 to 5, the agreement or disagreement of these variables will help me know the...

    Started by akluima‎, 10-01-2012 04:30 AM
    • Replies: 2
    • Views: 1,679
    10-01-2012, 08:39 AM Go to last post
  13. Multiple comparisons problem

    Dear all, In my research I frequently work with multi-channel EEG data, which yield data that are often subject to the multiple-comparisons...

    Started by Metansu‎, 10-01-2012 06:52 AM
    • Replies: 2
    • Views: 1,500
    10-01-2012, 07:54 AM Go to last post
  14. Question Test for symmetry? [Please]

    (This was posted in a different sub-section of the forum, but has remained unanswered for over a month. I'm posting it here in the hopes of getting a...

    Started by Gandalf‎, 08-28-2012 12:18 AM
    distribution, non parametric, symmetry, test
    • Replies: 2
    • Views: 1,249
    09-30-2012, 11:35 PM Go to last post
  15. Find Total Utility Consumed

    Hi, I have snapshots of electricity cosumption data. For eg. at 4:00 am, the consumption is 3000 kw at 4:15 am, the consumption is 15205 kw at...

    Started by suhana‎, 09-30-2012 11:01 PM
    energy consumed
    • Replies: 2
    • Views: 1,120
    09-30-2012, 11:23 PM Go to last post
  16. Cca

    Hello In CCA is it a must that the number of IV's to be less than or equal the number of DV's,i mean are there any assumptions or conditions about...

    Started by osamahamza‎, 09-26-2012 02:53 AM
    • Replies: 5
    • Views: 2,053
    09-30-2012, 02:32 AM Go to last post
  17. Help with finding P-Value

    I am examing the yearly % for different time periods. How do I determine the p values to see if the % changes are statistical significance? ...

    Started by ttom‎, 09-24-2012 06:59 PM
    • Replies: 1
    • Views: 1,744
    09-29-2012, 11:45 PM Go to last post
  18. Poisson assumptions for monthly data

    Hello all: I've been doing a lot of research and asking about time series and thought about count data. Let's say that one had counts of something...

    Started by lancearmstrong1313‎, 09-26-2012 10:22 AM
    • Replies: 1
    • Views: 2,013
    09-29-2012, 11:42 PM Go to last post
  19. Talking Shapley Value

    Hi, I'm trying to get a "Shapley Value" for determining each attributes utilities. I've already heard this could be done with simple excel or...

    Started by adamantem‎, 04-20-2009 04:43 AM
    • Replies: 10
    • Views: 13,204
    09-28-2012, 09:44 AM Go to last post
  20. [SOLVED] help with some sums and squares please? :)

    hey everyone! how are you all doing? so... thing. i'm having trouble following the algebraic steps on an article i'm reading. my math sumation...

    Started by spunky‎, 09-26-2012 05:19 PM
    • Replies: 2
    • Views: 2,912
    09-26-2012, 05:51 PM Go to last post
  21. inter-rater reliability with multiple raters - sample size determination

    Hi I will have to condact a obserbational test with multiple raters. Basically the raters have to obserbe subjects, and rate (categorical data) the...

    Started by JFI‎, 09-25-2012 03:41 PM
    • Replies: 0
    • Views: 3,082
    09-25-2012, 03:41 PM Go to last post
  22. help with reproducibility and accuracy - influence on sample sze

    Statistics query resolved at TalkStats Statistics query resolved at TalkStats Statistics query resolved at TalkStats

    Started by capturgaby‎, 09-24-2012 07:18 AM
    • Replies: 2
    • Views: 1,228
    09-24-2012, 10:38 AM Go to last post
  23. Decision Tree with Binary Target

    Hello, I have a dataset with a number of inouts and a binary target. I want to build a decision tree model. SAS states that the predictions can be...

    Started by zarasandreas‎, 09-24-2012 08:36 AM
    • Replies: 1
    • Views: 1,278
    09-24-2012, 09:56 AM Go to last post
  24. how to do a mixed model ANCOVA

    Hi all, I've been struggling for the past few days trying to figure out how to correctly run a mixed model ANCOVA. I have a continuous...

    Started by olberdjp‎, 09-21-2012 07:12 PM
    • Replies: 0
    • Views: 2,878
    09-21-2012, 07:12 PM Go to last post
  25. correlation for likert scale and respondent profile

    good day. so we are having problems what method to use to find the relationship between our respondents' profile and our leading variables. our...

    Started by rjkoko‎, 09-21-2012 03:14 AM
    • Replies: 0
    • Views: 1,723
    09-21-2012, 03:14 AM Go to last post
  26. What statistical procedures do I need to know to be a proficient psychologist?

    Or epidemiologist? Also, Do I need to go back and study matrix algebra in detail? Thank you? What are your experiences?

    Started by sampier85‎, 09-18-2012 04:25 PM
    applied statistics, psychology, regression analysis
    • Replies: 7
    • Views: 2,354
    09-20-2012, 12:48 PM Go to last post
  27. Testing a mediating model - what tests should i use?

    I am trying to test a model with 2 independent variables (communication, justice) and 1 dependent variable (OCB). These variables are measured by 1-5...

    Started by twentyberries‎, 09-20-2012 12:42 PM
    • Replies: 0
    • Views: 696
    09-20-2012, 12:42 PM Go to last post
  28. Post Properties of expectation

    I am working on a pricing methodology under certain conditions. Suppose we have a population of size N and this population has a distribution of...

    Started by kgan‎, 09-09-2012 10:03 AM
    expectation, expectation-maximization
    • Replies: 1
    • Views: 1,444
    09-20-2012, 01:35 AM Go to last post
  29. brushing up on my basic stats (ANOVA)

    I'm taking a design course that's making me revisit some elementary stats ideas that aren't as sharp as they were a year ago. I want to make sure...

    Started by trinker‎, 09-13-2012 11:24 PM
    anova, ctitique
    • Replies: 1
    • Views: 1,680
    09-20-2012, 12:25 AM Go to last post
  30. 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: 1,034
    09-20-2012, 12:17 AM Go to last post
  31. Looking for recommendations for a research project

    One of my classes is initiating a research project. We are examining differences (if any) in physical activity among residents of an area after a...

    Started by slccmh‎, 09-19-2012 09:07 AM
    • Replies: 0
    • Views: 1,018
    09-19-2012, 09:07 AM Go to last post
  32. Unhappy No idea how to perform my statistical analysis...

    Hello everybody! I'm new here... I'm really need help with this issue... Now I am so lost that I do have no idea how to do the stats for one of my...

    Started by hauptner‎, 08-30-2012 01:22 PM
    • Replies: 7
    • Views: 2,599
    09-18-2012, 09:55 AM Go to last post
  33. Comparing overdispersion distributions

    I am dealing with handling overdispersed count data(Poisson distributions fails to fit). I need to compare three different mixtures of Poisson...

    Started by arun‎, 09-14-2012 08:28 AM
    • Replies: 0
    • Views: 1,442
    09-14-2012, 08:28 AM Go to last post
  34. SEM (Structural Equation Modeling)-trimmed model

    Is it okay if I can fix one path between one moderator and another moderator (instead of one path between major variables) to 0 for trimmed model?...

    Started by eunkum‎, 09-13-2012 12:45 PM
    • Replies: 1
    • Views: 1,821
    09-13-2012, 07:06 PM Go to last post
  35. Tukey HSD after ANOVA

    Hi there, i have some trouble in understanding the Tukey HSD. Can you help me out please? I already did a 3x2(low vs middle vs high HRV level x...

    Started by Flowerpower‎, 09-12-2012 08:45 AM
    2 Pages
    1 2
    • Replies: 15
    • Views: 12,863
    09-13-2012, 07:13 AM Go to last post
  36. Buy-response survey!

    Hello, I'm about to initiate a price research where I'll examine the optimal price for a product. For the method I'm planning to to a...

    Started by kenniwr‎, 09-13-2012 02:59 AM
    • Replies: 0
    • Views: 3,303
    09-13-2012, 02:59 AM Go to last post
  37. relating continuous data to discrete data.

    Iím not a statistician, but a mathematician assigned to solve problems of engineering applications. However, recently Iíve come across some problems...

    Started by August‎, 09-12-2012 12:23 PM
    • Replies: 0
    • Views: 1,665
    09-12-2012, 12:23 PM Go to last post
  38. Bayesian model checking: a problem with Gelman's chi-squared test

    So, I foolishly tried to implement a test Gelman and his colleagues propose to determine whether observed data actually fits a model (Bayesian Data...

    Started by lostsoul‎, 09-09-2012 12:06 PM
    bayesian, gelman, model checking, test statistic
    • Replies: 2
    • Views: 2,672
    09-11-2012, 09:21 PM Go to last post
  39. Smile kappa intra observer error test on ordinal

    hi, sorry if this is all wrong ive never done stats or posted on this forum. im writing my masters dissertation in bioarchaeology and have a...

    Started by elwen_3‎, 09-10-2012 01:04 PM
    • Replies: 3
    • Views: 4,405
    09-11-2012, 12:23 PM Go to last post
  40. Non-parametric effect sizes

    Hi! I am hoping some might give me some pointer here on what do to regarding what seems to be a few different formulas for conversion of Z to...

    Started by Jiviken‎, 09-11-2012 06:46 AM
    • Replies: 0
    • Views: 1,985
    09-11-2012, 06:46 AM Go to last post
  41. How to find correlation of columns in a big table?

    Hello! Ist there a possibility / a tool to easily find a correlation between columns in a huge data table? Thnx.

    Started by Skipidar‎, 09-10-2012 08:00 AM
    • Replies: 1
    • Views: 1,518
    09-10-2012, 11:14 AM Go to last post
  42. 2 Cubed Experiment

    Could some one give me an example of a 2 cubed experiment? I am having trouble thinking about one. I need an experiment to record 2 different...

    Started by ChrisYee90‎, 09-09-2012 03:36 PM
    • Replies: 0
    • Views: 1,394
    09-09-2012, 03:36 PM Go to last post
  43. Help with inter-rater reliability

    Hi all, I've got a set of data that I need some advice on. I'm working on a pilot project where a group of four people evaluate essays. The way that...

    Started by Blank‎, 09-05-2012 02:17 PM
    • Replies: 14
    • Views: 3,826
    09-07-2012, 05:13 PM Go to last post
  44. further causal analysis

    Hi All, So I did this analysis on a dataset by exploiting partial correlation matrix. I can see how the variables are related to each other and to...

    Started by viktus‎, 07-20-2012 06:17 AM
    • Replies: 6
    • Views: 1,809
    09-06-2012, 03:56 PM Go to last post
  45. SEM - what is included in the measurement model?

    I am making an SEM model that includes 3 exogenous observed variables and 5 endogenous variables - two of which are latent and 3 of which are...

    Started by xralphyx‎, 09-06-2012 11:00 AM
    • Replies: 0
    • Views: 1,421
    09-06-2012, 11:00 AM Go to last post
  46. multicollinearity help with control variable

    Please can someone help me. I am looking at the effect of board ownership on stock performance and using ln market cap as the control variable....

    Started by chris_‎, 09-05-2012 03:58 PM
    • Replies: 0
    • Views: 1,230
    09-05-2012, 03:58 PM Go to last post
  47. Question Want to be researcher- needs help

    Hello all! I am currently designing my first research project and am confused on what to do after I have my data. I have a basic understanding of...

    Started by musicmancgs‎, 09-05-2012 10:45 AM
    design, research, spss, test
    • Replies: 3
    • Views: 1,975
    09-05-2012, 02:08 PM Go to last post
  48. Are nodes connecting each other random?

    Given a network composed of ten nodes and 20 symmetric ties, how to calculate the probability of displaying one or more cliques (nodes connecting...

    Started by watashi‎, 08-31-2012 11:16 PM
    • Replies: 0
    • Views: 1,475
    08-31-2012, 11:16 PM Go to last post
  49. Mahalanobis with a sample n=1

    Hi, I have a data set consisting of 4 samples, one of which has n=1 (it's a fossil). I want to calculate Mahalanobis posterior probabilities for...

    Started by kim221‎, 08-31-2012 01:35 PM
    • Replies: 0
    • Views: 1,420
    08-31-2012, 01:35 PM Go to last post
  50. Which test for manipulation check?

    In my research, 6 different scenarios were randomly assigned to the participants. The scenarios consisted of 2, 4 of 6 items and if these items were...

    Started by km88‎, 08-30-2012 02:09 PM
    • Replies: 2
    • Views: 10,829
    08-31-2012, 02:25 AM Go to last post
  51. Help with moderation analysis in SPSS for creativity research

    I'm trying to test out some moderating variables on my data. I ran an experiment looking at metaphor and creativity, with 3 moderating conditions. I...

    Started by poplin‎, 08-30-2012 08:52 PM
    creativity, moderation, spss
    • Replies: 0
    • Views: 2,290
    08-30-2012, 08:52 PM Go to last post
  52. Comparison of 20 serum chemistry analytes of reptile blood at time 0 and time 1 hour

    Dear All, I am having troubles in analyzing results of one study: I want to evaluate the effect of time (1 hour) on 20 analytes (e.g. pH, BUN,...

    Started by nicoladiggi‎, 08-30-2012 12:42 PM
    • Replies: 3
    • Views: 1,697
    08-30-2012, 06:09 PM Go to last post
  53. Using Mann-Whitney test when all values in one data set are zero (SPSS vs Graphpad)

    I would be very grateful for advice on the following problem: I am examining the frequency in which political issues are reported in the national...

    Started by sunilaup‎, 08-27-2012 02:38 PM
    • Replies: 5
    • Views: 2,720
    08-29-2012, 03:50 AM Go to last post
  54. Finding an extended Fmax table for an experiment with 25 treatments

    Hi everyone. Many of my experiments have a lot of treatments (>25) and I'm having a problem when it comes to calculating a critical Fmax value,...

    Started by Tara Duggan‎, 08-29-2012 03:20 AM
    • Replies: 0
    • Views: 1,291
    08-29-2012, 03:20 AM Go to last post
  55. Using Mann-Whitney U?

    Hi, I'm confused about which statistic to use. I want to find out if a law in two different states influences service delivery (get referral/ do...

    Started by picaritos‎, 08-21-2012 11:22 AM
    • Replies: 10
    • Views: 3,581
    08-27-2012, 03:56 PM Go to last post
  56. What test to use?

    I wonder if there are demographic variables (e.g., level of training, place of practice, age served) that determine knowledge on suicide. In my...

    Started by picaritos‎, 08-26-2012 05:22 PM
    • Replies: 2
    • Views: 1,826
    08-27-2012, 09:30 AM Go to last post
  57. Question on what statistics I should use

    Hello all, I have data from a survey of ex-prisoners. I want to look at the effect of victimization (victimized or not: dichotomous) on...

    Started by drforensicpsychologist‎, 08-25-2012 07:07 PM
    • Replies: 1
    • Views: 1,093
    08-27-2012, 03:49 AM Go to last post
  58. Create scale (or index) using items that are measured on with different scales

    Hello, I would like to make a scale of several items that are theoretically related, have a >.8 cronbach's alpha, but were measured on different...

    Started by jesse‎, 08-26-2012 07:16 PM
    scale development
    • Replies: 0
    • Views: 1,264
    08-26-2012, 07:16 PM Go to last post
  59. Comparison of the power of the tests: Parametric test versus Non-parametric test

    How can one compare using a simple experimentation or simulation whether a parametric test (e.g. t-test) is more powerful than its non-parametric...

    Started by imjae2‎, 08-26-2012 11:09 AM
    monte carlo, non-parametric test, parametric, simulation, statistical power
    • Replies: 6
    • Views: 4,764
    08-26-2012, 04:23 PM Go to last post
  60. Likert Scale - Issue with Pivot point

    Dear all, I conducted a research in the field of construction management measuring the importance of some variables.I submitted the result in a...

    Started by cruxifixo‎, 08-26-2012 02:34 PM
    • Replies: 0
    • Views: 1,673
    08-26-2012, 02:34 PM Go to last post

+ Post New Thread

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