1. 10-14-2010
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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: 1,643
    10-11-2014, 01:02 PM Go to last post
  1. Multifactorial analysis with R integrated TIME

    Hi there! I' about to analyze data using a multifactorial analysis with the R software and I'm not too sure on how to organize the factor groups. My...

    Started by cha‎, Today 05:28 AM
    multifactorial analysis, time
    • Replies: 0
    • Views: 30
    Today, 05:28 AM Go to last post
  2. 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: 113
    12-20-2014, 04:25 PM Go to last post
  3. Colculation Geometric Brownian Motion with deposits.

    Hi all. There is a way of colculation a future standart diviation of a portfolio if you know the daily standart diviation and the mean. ...

    Started by borislivs‎, 12-20-2014 03:00 PM
    • Replies: 1
    • Views: 73
    12-20-2014, 04:15 PM Go to last post
  4. How to alculate cross loadings of each item in SPSS ?

    Hello Can someone give me the way to do it in SPSS

    Started by hanialbarni‎, 12-20-2014 12:04 AM
    • Replies: 0
    • Views: 90
    12-20-2014, 12:04 AM Go to last post
  5. Calculating the standard error of an odds ratio from the standard errors of 2 logits

    I've just completed a logistic regression model with a continuous covariate, and calculated the logit and standard errors using SAS for creating a...

    Started by Disvengeance‎, 12-13-2014 09:53 PM
    3 Pages
    1 2 3
    • Replies: 35
    • Views: 775
    12-18-2014, 10:02 PM Go to last post
  6. How to do a Validation Study?

    My professor has asked me to do a validation study but I have never done one before and don't know what methodology or statistics to use. Basically...

    Started by amber82‎, 12-16-2014 11:44 PM
    methodology, scales, validate scale, validation
    • Replies: 1
    • Views: 104
    12-17-2014, 01:05 AM Go to last post
  7. Mediation Analysis with Categorical IV with 4 levels

    Hello all, I would like to do a mediation analysis using the following 3 variables: 1. Integration Strategy: This is the independent variable. It...

    Started by tez_s‎, 08-15-2012 08:20 AM
    dummy coding, mediation analysis, regression
    • Replies: 4
    • Views: 2,684
    12-16-2014, 08:27 PM Go to last post
  8. Marble-bag Memory Model in Behaviour Science

    I hope this is an acceptable forum for this. I have searched back to 2010 on the term 'geometric' without an answer. I'm trying to assist a...

    Started by pmcgee‎, 12-16-2014 07:35 PM
    • Replies: 0
    • Views: 94
    12-16-2014, 07:35 PM Go to last post
  9. Nonparametric methods

    If I have a sample with the size of the right and left arms of each of these people.So I have two dependent groups, since these are the same person,...

    Started by askazy‎, 12-12-2014 01:28 PM
    • Replies: 10
    • Views: 300
    12-16-2014, 06:30 AM Go to last post
  10. Question How can i check from this table if data normally distrubtion or not ?

    Hello How can I check from this output if data normally distribution or not ?

    Started by hanialbarni‎, 12-13-2014 02:04 AM
    • Replies: 1
    • Views: 172
    12-15-2014, 07:56 AM Go to last post
  11. Is this method to post-hoc determine the sample size a known one?

    Hi all! In the last weeks I'm facing the issue of determining if my sample is big enough to describe the world population. Apart from the usual...

    Started by ale_tuz‎, 05-05-2014 03:39 AM
    • Replies: 3
    • Views: 310
    12-12-2014, 08:16 AM Go to last post
  12. missing variable

    Items include the scale of 0 (Does not apply or not used) to 3 (Used a great deal). I want to combine several items to make one scale. I assigned a...

    Started by eunkum‎, 12-10-2014 03:14 PM
    missing varible
    • Replies: 0
    • Views: 162
    12-10-2014, 03:14 PM Go to last post
  13. Question randomisation - lack of replicates

    Dear all, I have question concerning statistical tests to compare 2 datasets without replicas. i will explain my problem into more detail: I...

    Started by mrtwino‎, 12-10-2014 04:02 AM
    • Replies: 0
    • Views: 123
    12-10-2014, 04:02 AM Go to last post
  14. Static simultaneous contingency model to dynamic simultaneous equations model

    Dear forum members, I have a task never attempted before and need some help. Given is a simultaneous contingency model in the following...

    Started by kiton‎, 12-05-2014 07:14 PM
    • Replies: 1
    • Views: 162
    12-09-2014, 03:59 PM Go to last post
  15. 3 way ANOVA with repeated measures... Data entry setup for statistica

    Hello all; I am doing a preliminary analysis on some data using STATISTCA, however being new to the software I am having a real difficult time...

    Started by rms5413‎, 05-22-2014 11:28 PM
    • Replies: 1
    • Views: 326
    12-09-2014, 02:24 PM Go to last post
  16. The appropriate form of analysis / technique and terms?

    My assignment is to do the give the appropriate form of analysis / technique or term for a list of scenarios. I am lost on a few and would...

    Started by I'm-your-0‎, 12-08-2014 01:15 PM
    psych, psychology statistics, stats
    • Replies: 1
    • Views: 258
    12-08-2014, 01:45 PM Go to last post
  17. What Analysis tools should I use in SPSS?

    I am trying to work through some research issues and NOT a stats major. I have all the data and using SPSS. My research question is to determine...

    Started by henni8a5‎, 12-06-2014 07:53 PM
    • Replies: 1
    • Views: 214
    12-08-2014, 03:04 AM Go to last post
  18. Raking ratio estimation - choice of counts?

    I am trying to use a raking ratio estimation in some survey analysis. I have three variables that I'll be using - variable 1 and variable 2 (both...

    Started by numbercrunching2014‎, 12-07-2014 03:07 PM
    • Replies: 0
    • Views: 146
    12-07-2014, 03:07 PM Go to last post
  19. Post How to transform non-normal variable to normal distrubtion ?

    Hello Good morning, Can you please give me a way to transform non-normal variable in SPSS to normal distributions? We try LG10(DATA) as...

    Started by hanialbarni‎, 12-05-2014 07:36 AM
    • Replies: 5
    • Views: 264
    12-06-2014, 11:01 AM Go to last post
  20. Testing relatedness, correlation test?

    I am looking for relationships in my data. But the more I've been thinking and reading, the more confused I am getting. So I'd kindly ask your POV. ...

    Started by Xbar‎, 12-05-2014 07:38 AM
    • Replies: 0
    • Views: 113
    12-05-2014, 07:38 AM Go to last post
  21. Lightbulb Accept Null hypothesis VS Reject Null hypothesis ?

    Hello Good evening everyone, I read about this for testing my hypothesis but still confusing me this accept/reject null hypothesis can...

    Started by hanialbarni‎, 12-02-2014 03:13 PM
    • Replies: 5
    • Views: 398
    12-03-2014, 05:38 AM Go to last post
  22. sample size calculation for surveys

    Hi, I am wondering if anyone knows how the sample size for HCAHPS mode study completed in 2007...

    Started by proc1125‎, 12-02-2014 02:07 PM
    • Replies: 0
    • Views: 137
    12-02-2014, 02:07 PM Go to last post
  23. Post Which analysis i should use to test/support hypothsis ?

    Hello Can someone tell me which type of analysis I should use to test hypothesis ? Which analysis best show me measure between 2 constructs ?

    Started by hanialbarni‎, 12-01-2014 08:14 AM
    • Replies: 5
    • Views: 248
    12-01-2014, 11:49 PM Go to last post
  24. RM ANOVA multivariate significance

    Hello, I recently did a RM ANOVA on some of my data, but I found something strange. The multivariate test was significant, but the univariate was...

    Started by kuraikawa‎, 11-30-2014 01:30 PM
    • Replies: 0
    • Views: 104
    11-30-2014, 01:30 PM Go to last post
  25. T Test

    I am trying to do a weighted mean ttest. The statistics I'm using are the vote shares for republican and democrat women candidates in primary...

    Started by fireball‎, 11-29-2014 09:29 PM
    • Replies: 1
    • Views: 229
    11-30-2014, 07:01 AM Go to last post
  26. Small difference but still significant?

    I hae sample size of 67 participants. They took a pre and post knowledge survey. The maximum score was 14 answers correct. I run a pair ttest. These...

    Started by Marvin85‎, 11-10-2014 02:38 PM
    pvalue, significant
    • Replies: 11
    • Views: 534
    11-30-2014, 03:42 AM Go to last post
  27. What's the correct correction factor? Multiple one-sample and paired tests...

    This question concerns the chance of Type I error in hypothesis testing with multiple statistical tests. The data come from a series of experiments....

    Started by 5tudent‎, 11-21-2014 06:15 PM
    bonferroni, correction, familywise, pairwise, t-test
    • Replies: 6
    • Views: 626
    11-28-2014, 08:13 PM Go to last post
  28. Red face Sample Size Calculation

    Hello all, I just recently came across this website and was hoping an intelligent mind could help me calculate the sample size required for a...

    Started by Chimpdaddy‎, 11-25-2014 04:05 AM
    • Replies: 1
    • Views: 255
    11-25-2014, 04:53 PM Go to last post
  29. 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: 175
    11-24-2014, 11:17 AM Go to last post
  30. Post Estimation Shrinkage Regression Coefficients

    Hey all, I am reading about shrinkage estimators. I am sure most of you are familiar with the concept. In any case, I start with a brief...

    Started by ledzep‎, 11-22-2014 05:37 AM
    • Replies: 1
    • Views: 168
    11-22-2014, 08:10 AM Go to last post
  31. Question How do I determine best choice based on confidence values?

    I have this problem I don't know how to solve. I have X variables. One of them is a key value. I have different data sets, each containing rows of...

    Started by genesis‎, 11-21-2014 12:08 AM
    • Replies: 0
    • Views: 153
    11-21-2014, 12:08 AM Go to last post
  32. Post What should i do after factor analysis output ?

    Hello, I am having a construct name trust that includes the following constructs: 1 - Benevolence ( 3 Items) 2 - Integrity ( 6 Items ) 3 -...

    Started by hanialbarni‎, 11-19-2014 10:11 AM
    • Replies: 3
    • Views: 235
    11-20-2014, 09:10 PM Go to last post
  33. 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: 175
    11-20-2014, 04:25 AM Go to last post
  34. statistical analysis at the regional level

    Hi I wanted to run multivariate analysis on data from regional level (i.e. regional population size, regional indicator values, regional equity...

    Started by proc1125‎, 11-18-2014 01:31 PM
    • Replies: 3
    • Views: 175
    11-19-2014, 10:43 AM Go to last post
  35. Statistical analysis of longitudinal data using multi-level model?

    Hello! This is my first post, I'm just wondering if I can use this approach? I want to research the opinion of 8 countries(data is a proportion),...

    Started by Talik‎, 11-14-2014 05:48 PM
    • Replies: 4
    • Views: 366
    11-18-2014, 06:03 PM Go to last post
  36. Basic ANOVA question

    We had individuals fill out a survey where they assign importance to five categories. So for example: if given $1000 to distribute among five...

    Started by singerjr‎, 11-18-2014 09:05 AM
    • Replies: 6
    • Views: 251
    11-18-2014, 05:22 PM Go to last post
  37. dealing with unequal sample sizes... can anyone help please?

    Hello, I am comparing men and women on outcomes of their diagnostic assessment (autism). there are approx 600 men and 200 women. I have used...

    Started by ellie_w‎, 11-17-2014 10:10 AM
    representativeness, unequal sample sizes
    • Replies: 7
    • Views: 336
    11-18-2014, 04:14 AM Go to last post
  38. Post How to test data if it is normal distribution in spss ?

    Hello Good morning guys i will need some help truly i have variables in spss most of them scale type, some of them are nominal, and few are...

    Started by hanialbarni‎, 11-12-2014 11:29 PM
    distribution, graph, normal, problem formulation, spss
    • Replies: 6
    • Views: 366
    11-18-2014, 03:01 AM Go to last post
  39. Sample size help!!

    Hello! New to the forum but would greatly appreciate any help people may have to offer... Essentially I am trying to organise a scientific study...

    Started by aglove‎, 11-13-2014 03:23 PM
    • Replies: 5
    • Views: 366
    11-17-2014, 03:53 PM Go to last post
  40. State the null and alternative hypothesis

    Dear all, Can someone please give me some advise on this one? I need to state the Ho en Ha hypothesis, I know how to do it in words but not in the...

    Started by Micheller‎, 11-12-2014 12:49 PM
    • Replies: 5
    • Views: 403
    11-16-2014, 01:09 PM Go to last post
  41. Looking to hire freelance statistician

    I'm sorry if this isn't the right thread to post this question, but here goes. I'm looking for a statistician to do some freelance work, but I'm...

    Started by jonmrich‎, 11-13-2014 11:05 AM
    • Replies: 8
    • Views: 292
    11-13-2014, 01:07 PM Go to last post

    Hello, For my study, I will use a data set that includes 22 schools, 2 to 20 teachers in each school, and 4 students from each teachers'...

    Started by HHH‎, 11-11-2014 10:27 AM
    • Replies: 0
    • Views: 210
    11-11-2014, 10:27 AM Go to last post
  43. Likert Analysis

    Hi all, I'm doing some analysis of survey data for a research project. On the broadest level, I have data from art teachers about all sorts of...

    Started by scottwc‎, 11-09-2014 07:20 PM
    • Replies: 1
    • Views: 239
    11-10-2014, 03:16 AM Go to last post
  44. Assumptions of statistic models

    I was watching (https://www.youtube.com/watch?v=8SGif63VW6E) and he said a statement that made me think: 8SGif63VW6E#t=134 I asked for...

    Started by trinker‎, 11-07-2014 05:20 PM
    • Replies: 1
    • Views: 224
    11-07-2014, 06:34 PM Go to last post
  45. Repeated measures data

    Hello I want to test the significance between the treatments on repeated measures. I have the 3 groups A, B and C and response for them was...

    Started by rzs0034‎, 11-04-2014 07:52 PM
    • Replies: 4
    • Views: 309
    11-07-2014, 02:35 AM Go to last post
  46. Steel dwass vs. wilcoxon each pair

    Hello Wilcoxon each pair vs. Steel dwass non parmaetric multiple comparison test in JMP. Which one is more powerful and why? I would really...

    Started by rzs0034‎, 11-06-2014 07:00 PM
    • Replies: 0
    • Views: 149
    11-06-2014, 07:00 PM Go to last post
  47. generate constrained combinations

    I have some vectors like this V1= V2= V3= V4= I would like to get all possible combinations from these vectors that look like this ,V2,V3,v4]...

    Started by kjohn‎, 11-05-2014 05:14 PM
    combinations, constraints
    • Replies: 0
    • Views: 201
    11-05-2014, 05:14 PM Go to last post
  48. Compare type of procedure with an outcome - which analysis is best?

    Good morning, I'm writing a medical meta-analysis, and I need help with a part of the statistical analysis. I gathered articles from various...

    Started by giuly_gt‎, 11-05-2014 08:55 AM
    • Replies: 0
    • Views: 199
    11-05-2014, 08:55 AM Go to last post
  49. Which analyzing technique?

    Im currently working on my thesis and I wonder which analysis technique to use. I have 2 dependent variables: voting choice (1 exwtreme left,...

    Started by Annvdb‎, 11-05-2014 04:13 AM
    logistic regression, multinomial regression
    • Replies: 0
    • Views: 201
    11-05-2014, 04:13 AM Go to last post
  50. Modified bland Altman- plotting difference aganst the criterion measure

    Hi all, I am measuring the agreement between a movement sensor that estimates VO2 in humans during exercise and criterion VO2. My supervisor advised...

    Started by FightingBull‎, 11-01-2014 09:05 AM
    agreement, altman, bland
    • Replies: 0
    • Views: 245
    11-01-2014, 09:05 AM Go to last post
  51. Tukey kramer

    Hello I am applying Tukey Kramer on a data problem. Actually, there are 5 treatments that i want to compare and 1 is control. Out of 5...

    Started by rzs0034‎, 10-30-2014 06:17 PM
    tukey kramer
    • Replies: 0
    • Views: 232
    10-30-2014, 06:17 PM Go to last post
  52. Statistical analysis of variable data

    Hello I have the statistical research data. I have 6 treatments with 3 boxes for each treatment. I am raining on the treatments every week and...

    Started by rzs0034‎, 10-30-2014 04:31 PM
    • Replies: 0
    • Views: 232
    10-30-2014, 04:31 PM Go to last post
  53. Correct measure of central tendency for Skewed distribution

    Dear Talk Stats users, I am trying to solve following problem. I've got a data, which has a skewed distriubution (see attachment ) Now I can...

    Started by Namba‎, 10-30-2014 07:33 AM
    • Replies: 6
    • Views: 269
    10-30-2014, 12:26 PM Go to last post
  54. Generalized estimating equations and multiple imputation

    Hi, I'm running a Generalized estimating equation model with multiple imputed data but I can not get a pooled outcome. Do anyone have a solution to...

    Started by Ulrik‎, 10-29-2014 04:54 AM
    gee multiple imputation
    • Replies: 4
    • Views: 282
    10-29-2014, 04:06 PM Go to last post
  55. How well a few values fit a given distribution?

    Dear all, I have approximated two one-dimensional random variables A and B using Gaussian Mixture Models (3 gaussians). I used...

    Started by eelioss‎, 10-24-2014 10:28 AM
    • Replies: 1
    • Views: 312
    10-28-2014, 05:56 AM Go to last post
  56. Do you like this measure for status inconsistency?

    For my thesis I have a variable named 'status inconsistency', so I want to compare people whose income or profession doesnt allign with their...

    Started by Annvdb‎, 10-28-2014 01:35 AM
    spss, status inconsistency
    • Replies: 0
    • Views: 175
    10-28-2014, 01:35 AM Go to last post
  57. Chi-square influential categories

    I have counts of events in a number of categories and an a priori expected frequency for those events. Clearly, this is a standard chi-squared. ...

    Started by bioniclime‎, 10-27-2014 01:05 PM
    chi-square test, influence
    • Replies: 3
    • Views: 219
    10-27-2014, 04:55 PM Go to last post
  58. Question Are they misunderstanding ANOVAs here?

    Hi, Here's an extract from a paper I'm using in a systematic review: The mean GAD-7 score of the sample prior to the course was 10.98 (SD 5.17,...

    Started by fishfishfish3‎, 10-23-2014 12:56 PM
    anova, post hoc
    • Replies: 8
    • Views: 396
    10-24-2014, 12:22 PM Go to last post
  59. Repeated measures ANOVA vs. Mixed Models

    Hi, I'm trying to analyze the results of my Master Thesis with SPSS. I've 3 experimental conditions (factor: Group) and for variable A every...

    Started by Lullabi_8888‎, 10-24-2014 04:38 AM
    mixed models, repeated measure anova
    • Replies: 0
    • Views: 217
    10-24-2014, 04:38 AM Go to last post
  60. Data analysis : replication and pseudoreplication

    I have several questions concerning analysis of data, especially when there are replications and/or pseudoreplications. First, I read an example...

    Started by statah‎, 10-23-2014 09:41 PM
    • Replies: 0
    • Views: 208
    10-23-2014, 09:41 PM Go to last post

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