1. 10-14-2010
+ Post New Thread
Page 1 of 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 51 ... LastLast
Threads 1 to 60 of 3110

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: 11,603
    10-11-2014, 12:02 PM Go to last post
  1. Hotelling's T2 test and chi2 distributions

    For the 1-2 weeks I've been trying to decompose the T2 statistic into two independent chi2-distributed statistics, but have had no success. I'm...

    Started by MikeC‎, Today 01:34 PM
    • Replies: 0
    • Views: 40
    Today, 01:34 PM Go to last post
  2. how it comes Exact sig = 1

    hello, please help me to intrepret the Mann whitney output figuring in the picture bellow.And especially if the (exact sig = 1) is coorect ? ...

    Started by ilyes‎, Yesterday 06:02 AM
    • Replies: 0
    • Views: 103
    Yesterday, 06:02 AM Go to last post
  3. SPSS Correlation of single variable and independent variables

    Hello, I am working in spss 23 and I'm stuck. I have data for which I am attempting to determine if certain color of a personality (there are 4...

    Started by kellytwilliams‎, 04-21-2017 11:01 AM
    correlation analysis, spss 23
    • Replies: 3
    • Views: 137
    Yesterday, 02:48 AM Go to last post
  4. Statistical report

    Hi, I am a first-year business student that is taking a stats class. I have a report assignment with the requirement of an executive survey and...

    Started by Sam1218‎, 04-16-2017 09:17 PM
    descriptive statistics, executive summary, graphical representation, inferential statistics, statistical report
    • Replies: 0
    • Views: 167
    04-16-2017, 09:17 PM Go to last post
  5. Can I use an independent t-test to test for significant differences over time?

    I have a 50 year time series (2012-2062), and I would like to test to see whether sig. differences exist between two groups of data subjected to...

    Started by Miz123‎, 04-15-2017 08:20 AM
    • Replies: 0
    • Views: 141
    04-15-2017, 08:20 AM Go to last post
  6. GOF measures

    When we validate a statistical model, should we only consider the traditional Goodness-Of-Fit measures? Are there other ways in which the model...

    Started by shane414‎, 04-14-2017 03:09 AM
    • Replies: 1
    • Views: 153
    04-14-2017, 10:48 AM Go to last post
  7. GOF Analysis/Discussion

    What actions constitute an analysis of goodness-of-fit for a regression model? What are the typical graphical displays used in this analysis of...

    Started by shane414‎, 04-14-2017 02:54 AM
    regression analysis
    • Replies: 1
    • Views: 107
    04-14-2017, 10:33 AM Go to last post
  8. Dealing with censored dates as regressors

    I'm estimating a linear model, with one of the independent variables being a date of appearance. I consider the date to be a minimum date of...

    Started by nbi‎, 03-30-2017 07:30 AM
    censoring, regression, time-series
    • Replies: 2
    • Views: 191
    04-13-2017, 11:31 AM Go to last post
  9. [ANOVA - Repeated Measures] When to include subject as a random effect?

    I have an eye tracking study in which two groups of subjects (patient and control) are completing a face recognition task in which they learn a set...

    Started by ProfCorrow‎, 03-10-2017 12:26 PM
    random effect, repeated measures anova
    • Replies: 2
    • Views: 371
    04-11-2017, 12:00 PM Go to last post
  10. Regression Analysis

    I'm trying to better understand linear regression by the following questions. (1) Linear regression assumes: a. The relationship between X...

    Started by msoe414‎, 04-07-2017 04:49 AM
    statistics help
    • Replies: 5
    • Views: 387
    04-07-2017, 10:35 PM Go to last post
  11. How to best maximize sample size for a third order factor CFA

    Dear all, I have a sample size question that I'd like to consult your opinions on. In our lab, we gave a particular measure to roughly 450...

    Started by myautumn28‎, 04-07-2017 10:34 AM
    • Replies: 0
    • Views: 152
    04-07-2017, 10:34 AM Go to last post
  12. Advantages/disadvantages of computing composite score these ways

    Hi, I'd highly appreciate your recommendations for a research I'm doing. More specifically, I'd like to know the advantages, disadvantages, and...

    Started by StatTalker‎, 04-03-2017 08:05 AM
    • Replies: 2
    • Views: 296
    04-04-2017, 02:18 AM Go to last post
  13. comparing section in a scale using spss

    Hi everyone; hope you are doing well, I am actually conducting a research, and I am comparing between a pre and post scale. my problem is that...

    Started by rukia‎, 03-24-2017 07:54 AM
    • Replies: 4
    • Views: 336
    04-02-2017, 09:55 PM Go to last post
  14. how do we estimate regression parameters in survival analysis

    Dear All, I would like to ask how to estimate regression parameters(Beta) in Accelerated Failure Time Model? Does anybody knows any resources?...

    Started by masarimk‎, 03-25-2017 11:58 PM
    • Replies: 3
    • Views: 385
    04-02-2017, 10:43 AM Go to last post
  15. Is survey design statistically correct?

    I want to track improvements in how yoga class participants feel on various variables (e.g. energy level, sleep quality, pain felt, mental...

    Started by johnsif‎, 03-30-2017 02:47 AM
    • Replies: 8
    • Views: 338
    04-02-2017, 10:33 AM Go to last post
  16. Smile Which test to use?

    I have a study whereby I asked two groups of participants (Clients (N=76) and Professionals (N=62) what qualities would make a treatment interaction...

    Started by sf27‎, 04-01-2017 03:26 AM
    • Replies: 0
    • Views: 188
    04-01-2017, 03:26 AM Go to last post
  17. Selecting of statistical test?

    I have a study whereby I asked two groups of participants (Clients (N=76) and Professionals (N=62) what qualities would make a treatment interaction...

    Started by sf27‎, 04-01-2017 03:20 AM
    chi square, statistic test, t-test
    • Replies: 0
    • Views: 74
    04-01-2017, 03:20 AM Go to last post
  18. Meta-analysis - Can I investigate mediation effects for the effectiveness of training

    Hello everyone, I am currently working on my Master thesis on moderators and mediators for the effectiveness of cross-cultural training (CCT). I...

    Started by ChristinaK91‎, 03-25-2017 11:34 AM
    mediating effect, mediator, meta-analysis
    • Replies: 0
    • Views: 244
    03-25-2017, 11:34 AM Go to last post
  19. 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: 252
    03-24-2017, 08:36 AM Go to last post
  20. reverse causality and endogeneity problems

    Hi all, I am trying to analyse the effect of the sex of a CEO (female vs male) on a performance measure of two types of firms (Conglomerate and...

    Started by a_dabch‎, 03-15-2017 04:25 PM
    • Replies: 1
    • Views: 400
    03-23-2017, 12:55 PM Go to last post
  21. 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: 863
    03-22-2017, 07:22 AM Go to last post
  22. How to combine correlated vector-valued estimates

    I'd like to combine several vector-valued estimates of a physical quantity in order to obtain a better estimate with less uncertainty. As in the...

    Started by WhiteHaired‎, 03-21-2017 05:50 AM
    combine estimates, correlated estimates, uncertainty propagation, vector-valued estimates, weighted mean
    • Replies: 1
    • Views: 213
    03-21-2017, 03:03 PM Go to last post
  23. Interpreting CFA Output

    I have recently been performing confirmatory factor analysis to assess model fit for an established measure, the measure has previously been...

    Started by RPortman7‎, 03-20-2017 07:33 AM
    cfa, dataanalysis
    • Replies: 0
    • Views: 230
    03-20-2017, 07:33 AM Go to last post
  24. Data Collection

    I am an education major and am lost in my research class! I have the research question of, "How does classical music playing in the background...

    Started by GradStudent17‎, 03-15-2017 06:53 AM
    • Replies: 1
    • Views: 315
    03-15-2017, 07:28 AM Go to last post
  25. What specific type of GLM to use?

    I'm trying to figure out what type of distribution (Poisson or binomial) to use to measure differences in proportions using logistic glm. Basically I...

    Started by atamalu‎, 03-12-2017 06:25 PM
    • Replies: 2
    • Views: 334
    03-13-2017, 04:52 PM Go to last post
  26. clasiffy - weka

    can I use cfs setset evaluator /greedy stepwise for correlated? Which attributes seem to be most linked to the class attribute? how do understand...

    Started by raju1‎, 03-12-2017 04:33 PM
    • Replies: 0
    • Views: 186
    03-12-2017, 04:33 PM Go to last post
  27. Bayesian analog to Generalized Estimating Equations?

    GEE2 (second order generalized estimating equations, see Prentice and Zhao 1991 Biometrics) can be used to model the mean and covariance of a...

    Started by jaron003‎, 03-10-2017 04:00 PM
    • Replies: 1
    • Views: 331
    03-11-2017, 10:46 AM Go to last post
  28. Anova?

    Hi I have a question regarding statistical tests. Assume that I have to run a program 5 times (5 iterations) and each time it gives me some...

    Started by Basemah‎, 03-10-2017 06:38 PM
    • Replies: 0
    • Views: 272
    03-10-2017, 06:38 PM Go to last post
  29. How to compare R2 across three independent samples?

    Is it possible to compare an R2 value across three independent samples? I am familiar with the Fisher r to z test, but this is only for correlation...

    Started by newbie8888‎, 03-07-2017 01:00 PM
    anova, regression
    • Replies: 0
    • Views: 351
    03-07-2017, 01:00 PM Go to last post
  30. statistical inference in materials science

    Hi all, I'm currently doing a quick study into a material where grain size could potentially affect a desired property Y, but I'm uncertain about...

    Started by dhvd90‎, 03-07-2017 12:17 PM
    • Replies: 0
    • Views: 213
    03-07-2017, 12:17 PM Go to last post
  31. 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: 465
    03-05-2017, 09:09 AM Go to last post
  32. Difference between two independent proportions

    Hello, I am not a statistician, however, for my latest small research, I would like to test whether there is a difference between two independent...

    Started by Zuzanah‎, 11-07-2016 07:10 AM
    chi-square, proportion test, z-test
    • Replies: 4
    • Views: 1,422
    03-03-2017, 01:48 PM Go to last post
  33. Analysing Limited Data

    Help! For my thesis I involuntary have a small dataset due to a limited population. I was thinking about analysing this data with the statistical...

    Started by IngevanderBorg‎, 03-03-2017 06:52 AM
    anova, bayesian analysis, nonparametric, small data set
    • Replies: 0
    • Views: 254
    03-03-2017, 06:52 AM Go to last post
  34. Anova with data reduction? (Experimental design)

    Hi, this is my first post, I hope to do nothing wrong like posting in the wrong area.:pag It happens that I did an experiment where I have a...

    Started by Bardock‎, 03-01-2017 08:59 AM
    anova observations, data, data analysis, reduction os data
    • Replies: 4
    • Views: 472
    03-03-2017, 01:37 AM Go to last post
  35. Finding my control group PSM, Matching or regression model and correct for confounder

    Hey there, First off I'm hoping I'm posting this in the right place. I'm doing research where there is a patient group of n=9 that underwent...

    Started by Longo‎, 03-01-2017 01:43 PM
    confounders, control group, help needed, matching, regression model
    • Replies: 3
    • Views: 444
    03-02-2017, 09:41 PM Go to last post
  36. Correcting alpha for multiple anovas

    Hi! I have 7 different properties, all independent, that are being mesured. Each property has a control and three disease groups. All independent....

    Started by Szkeptik‎, 02-25-2017 03:30 PM
    • Replies: 1
    • Views: 476
    03-02-2017, 01:38 PM Go to last post
  37. Statistic test for comparing time budget?

    Hi all I am a beginner in statistics and I have the following difficulty. I video-recorded some animals in two populations and I calculated...

    Started by Christinec‎, 03-02-2017 03:44 AM
    • Replies: 1
    • Views: 445
    03-02-2017, 11:20 AM Go to last post
  38. ANOVA or t-test?

    I want to test 2 different treatments (diets), repeating each treatment 3 times on 25 individuals independent samples. After each repetition, four...

    Started by marloncalispa‎, 02-20-2017 12:23 PM
    anova, t-test
    • Replies: 2
    • Views: 622
    03-01-2017, 12:20 PM Go to last post
  39. Select two variables with values closest to 50 among 5 variables

    I have a problem regarding the analysis of a big dataset, that I can't seem to tackle by myself! Help would be really appreciated: This is the...

    Started by tastea‎, 03-01-2017 09:41 AM
    • Replies: 0
    • Views: 242
    03-01-2017, 09:41 AM Go to last post
  40. Dealing with unknown dependencies between variables

    Hi! I have a system where I'm studying 3 different diseases, however they share some pathological similarities. There is no data on them being...

    Started by Szkeptik‎, 02-26-2017 08:31 AM
    • Replies: 2
    • Views: 654
    02-26-2017, 10:51 PM Go to last post
  41. Exclamation Need help selecting appropriate test

    I'm currently trying to select the appropriate significance test and test of association and would really appreciate some help. My independent...

    Started by geosfranklin‎, 02-26-2017 02:38 PM
    chi sq test, ordinal and categorical
    • Replies: 0
    • Views: 362
    02-26-2017, 02:38 PM Go to last post
  42. Stats Help please...

    Hi, I'm not the best at stats so please keep terms and approaches in layman's terms please - I currently use SPSS too :) I'm not too sure which...

    Started by JD823‎, 02-24-2017 11:53 AM
    • Replies: 0
    • Views: 390
    02-24-2017, 11:53 AM Go to last post
  43. Poisson Distribution

    Hi, I am using the Poission distribution to calculate probabillity for x = X. Poisson distribution is skewed to the right when lambda is small....

    Started by samot79‎, 02-08-2017 08:21 AM
    • Replies: 7
    • Views: 751
    02-20-2017, 05:07 AM Go to last post
  44. obtain inter-aarival from bulk arrival

    I have some data regarding the arrival of customers at a shop. These arrivals are bulk arrivals which have been collected at fixed time intervals...

    Started by mohsenhs82‎, 02-16-2017 05:22 PM
    2 Pages
    1 2
    arrival time, probabilities, queuing theory, random variable, stochastic
    • Replies: 16
    • Views: 1,103
    02-19-2017, 05:24 PM Go to last post
  45. Help with confirming what I can and cannot conclude from this regression output

    This study tried to determine the factors influencing the probability that voters would be asked to show ID in order to vote in a certain state...

    Started by Harry717‎, 02-18-2017 12:14 PM
    • Replies: 1
    • Views: 379
    02-19-2017, 04:55 PM Go to last post
  46. Help with master thesis method for analysis, first time quantitative research

    Deleted because of serious flaw in question asked. Will edit with an update

    Started by seaturtle‎, 02-17-2017 07:10 PM
    • Replies: 0
    • Views: 569
    02-17-2017, 07:10 PM Go to last post
  47. Smile What model to use?

    Hi, I'm currently doing a piece of research that requires statistical analysis however this is very out of my comfort zone and I am unsure of what...

    Started by jmht‎, 02-17-2017 08:23 AM
    • Replies: 2
    • Views: 529
    02-17-2017, 04:14 PM Go to last post
  48. Sample size determination for ANOVA / KRUSKAL WALIS

    Hi! I need help with my dissertation regarding sample size calculation. I will be grateful if anybody can help me out with this... My study...

    Started by janicedsa‎, 02-16-2017 11:04 PM
    sample size
    • Replies: 0
    • Views: 431
    02-16-2017, 11:04 PM Go to last post
  49. RMSEA manually

    Hello, I'm working with the trial version of a software that does not allow me to calculate the RMSEA for my CFA. Could I calculate this manually?...

    Started by ernesthor‎, 02-13-2017 04:50 AM
    • Replies: 0
    • Views: 546
    02-13-2017, 04:50 AM Go to last post
  50. is my concept of averaging averages under this scenario wrong?

    hi all, I'm confused on the concept of whether or not to average the averages under this scenario, when the data collected are from different...

    Started by stat newbie L‎, 02-11-2017 04:48 AM
    averaging averages
    • Replies: 0
    • Views: 520
    02-11-2017, 04:48 AM Go to last post
  51. Correlation length

    Hi all, I'm working on a hydrological model. I supposed to build a mesh with correlation length in the permeability field. I know what is the...

    Started by Evyatar‎, 02-02-2017 04:14 AM
    correlation, correlation length
    • Replies: 7
    • Views: 1,034
    02-08-2017, 10:34 AM Go to last post
  52. Theoretical Regression Problems

    What is the term for when your outcome variable is truncated and that may be dampening your results? For example, you use a dichotomous outcome for...

    Started by kmed‎, 02-06-2017 03:52 PM
    • Replies: 11
    • Views: 707
    02-07-2017, 09:52 AM Go to last post
  53. Medical Device Testing (CV%)

    Hi all, looking for a bit of help. I have a number of medical devices to test, 150 to be precise. Two levels of sample to test on each device. I...

    Started by mattjdenmead‎, 02-04-2017 12:07 PM
    • Replies: 0
    • Views: 540
    02-04-2017, 12:07 PM Go to last post
  54. Wink Stuck with my darn P value

    Hey guys So I've been doing some medical research and I have a great result by no idea how to approach working out the P value. Basically with...

    Started by PKrazda‎, 01-26-2017 12:24 PM
    4 Pages
    1 2 3 ... 4
    • Replies: 45
    • Views: 3,588
    02-03-2017, 03:02 PM Go to last post
  55. Help understanding separate- and joint- factor analyses in CFA and ESEM

    Folks, I am reading an article that tested 2 models--one with an hypothesized separate-factor relationship between five pairs of personality...

    Started by barrygrant‎, 02-02-2017 01:24 PM
    cfa, esem, factor analysis
    • Replies: 2
    • Views: 691
    02-03-2017, 10:43 AM Go to last post
  56. HELP: Using Data on Different Spatial Scales for Econometric Regressions

    *Background: Using a Production Function in form of Autoregressive Regression Model for Regional Perfomance* Hi, This question is more of a...

    Started by dave_123‎, 02-03-2017 03:06 AM
    dataset, econometric, regression, scale, spatial
    • Replies: 0
    • Views: 456
    02-03-2017, 03:06 AM Go to last post
  57. How to rank factors of a confirmatory factor analysis?

    Hey there, within my current study I would like to determine the importance of different behavioral intentions. Since behavioral intentions are...

    Started by Fk2803‎, 01-30-2017 05:52 PM
    • Replies: 0
    • Views: 514
    01-30-2017, 05:52 PM Go to last post
  58. Unsure of which statistical method to use- Please help!

    Hello, I'm writing a research proposal but I don't have a strong background in statistics. It would be great if someone can let me know which...

    Started by macjkk‎, 01-30-2017 12:01 AM
    • Replies: 2
    • Views: 719
    01-30-2017, 04:24 PM Go to last post
  59. Looking for appropriate non-parametric test for 5 dependent group & small sample size

    What is the most appropriate parametric test for repeated observations for multiple dependent groups.

    Started by Zwsean‎, 01-28-2017 01:08 PM
    dependent groups, nonparametric, small sample, test
    • Replies: 1
    • Views: 744
    01-29-2017, 12:56 AM Go to last post
  60. utizing slightly different variables as 1 variable

    I am running a path model, and one of my DV's that I wish to utilize is course performance. The problem is that across my classes that are in my...

    Started by schue20‎, 01-26-2017 11:47 PM
    • Replies: 1
    • Views: 712
    01-27-2017, 03:31 PM Go to last post

+ Post New Thread
Page 1 of 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 51 ... 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