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# Forum: Statistical Research

Statistical theory and methodology. Mathematical statistics. Parametric inference. Nonparametric inference.

1. ### 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...

• Replies: 14
• Views: 19,443
10-11-2014, 12:02 PM
1. ### Multinomial probabilty

Hi, Could anyone suggest what test should I apply in the case I have probabilities of 0. For example, I have a vector of counts 127,2,1,0 and I...

• Replies: 1
• Views: 1,283
10-14-2015, 12:40 PM
2. ### Multiple correspondence analysis with fuzzy coding

Hello, I have a data set with six continuous variables. I would like to perform a multiple correspondence analysis (MCA) with fuzzy coding. I was...

• Replies: 0
• Views: 1,382
10-12-2015, 08:42 AM
3. ### Testing of correlation coefficients

Hello, I am wondering if there is any way to test the significance of the correlation coefficients provided in the Eviews 7 cross-correlogram....

• Replies: 0
• Views: 1,100
10-11-2015, 02:46 PM
4. ### Choosing test for dependent anonymous sample comparisons

I have data collected each year from 2010-2015. In this data I have demographic information and a self-reported score on a 5 pt Likert scale. The...

• Replies: 0
• Views: 1,092
10-08-2015, 07:24 AM
5. ### Difference between samples in terms of frequency ranks

I have 3 different texts, and for each one of them, I have the frequencies of 25 letters appearing in those texts (Text A, letter A, freq = 5013;...

• Replies: 0
• Views: 1,456
10-07-2015, 01:57 AM
6. ### How to do a post hoc analysis on non-parametric data in SAS

Good morning! I know there is a statistically significant difference between groups for my non-parametric data-set but I'm not sure how to find...

• Replies: 2
• Views: 2,215
10-02-2015, 01:05 PM

Hi guys, please read me. I need your help. I am a medical student and I am confused with statistics for my research. Ive seen videos in youtube but...

• Replies: 2
• Views: 1,471
10-02-2015, 07:32 AM
8. ### How to analyse 5-point likert data with different questions under 1 subset?

I am working on a research assignment, and has received enough data for analysis In the project, I used health belief model (HBM) to investigate...

• Replies: 1
• Views: 2,326
10-01-2015, 08:23 AM
9. ### Effect-size Two-way ANOVA repeated measures

Dear statistical experts, I am getting confused on how to compute effect size in two-way ANOVA with repeated measures. - Should I use Cohen d...

• Replies: 0
• Views: 2,052
09-30-2015, 06:14 AM
10. ### Test for difference between ratio of means, unequal variance.

Hello there, I an experimental design were I wish to test if the effect of a treatment on several subjects type is different to the effect of...

• Replies: 5
• Views: 6,422
09-29-2015, 11:58 PM
11. ### Calculating likelihood for a particular biological sample. Is is possible?

Hi you all! I've got a problem when trying to analyze some biological data in my PhD. Let's say that I'm interested in performing an analysis...

• Replies: 0
• Views: 1,157
09-29-2015, 06:42 AM
12. ### Coding Group Equivalency on Pre-Treatment Measures for Meta-Analysis?

Hello- I am constructing a code book for a meta-analysis. I only want to include evaluations where program and comparison groups were reasonably...

• Replies: 0
• Views: 772
09-27-2015, 11:41 PM
13. ### Cell culture experiments - parametric testing when there are only three repeats!

Felt this was a theoretical discussion point. My thesis includes cell culture experiments with 100,000 cells per condition repeated three times....

• Replies: 0
• Views: 1,544
09-22-2015, 01:06 PM
14. ### Suggestions for model fit with unusual data set?

Good morning, I'm struggling to fit a satisfactory model to a data set I have resulting from a systematic review. I performed a systematic review...

• Replies: 0
• Views: 2,468
09-21-2015, 05:26 AM
15. ### Input of "0" as a data point

Hi I am trying to use PCA analysis on chemical data using concentrations that have been identified. I have 1000's of data points and a lot of...

• Replies: 0
• Views: 1,093
09-17-2015, 08:26 AM
16. ### Report effect size?

Hi, I am new to this forum and my knowledge about statistic is pretty basic. So beforehand I thank you for your help. In my research I used non...

• Replies: 0
• Views: 1,852
09-14-2015, 12:29 PM
17. ### Advice for a book about Higher Order and Asymptotic Likelihood

Hi, I'm a bachelor student in statistics. I'm looking for a book about higher order and asymptotic likelihood that is not too complicated and...

• Replies: 0
• Views: 853
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09-14-2015, 07:50 AM
18. ### Repeated measures GLM - restricted permutations

Hi all, I have some multivariate data (species counts) and want to investigate the effect of some treatment over time. I am using the mvabund...

• Replies: 0
• Views: 1,263
09-09-2015, 04:38 PM
19. ### Bayesian MCMC Fitting lognorm mixture model w/constraint on population mean

I am trying to find a reference and/or guidance for fitting a mixture model to a population of data within an MCMC framwork where the global mean is...

• Replies: 0
• Views: 1,389
09-02-2015, 12:37 PM
20. ### A Soccer/Football Ratings System - Home Advantage

Hi guys, this is my first post. (So do lower your expectations) I'm currently writing a thesis that deal with sports probabilities and part of the...

• Replies: 2
• Views: 4,013
09-02-2015, 03:42 AM
21. ### May anyone please tell me what does this output express?

image hosting 5mb

• Replies: 0
• Views: 1,413
09-01-2015, 06:08 PM
22. ### Differences in differences analysis( 2 vs 1 data values)

Hello I am carrying out a differences in differences analysis for the effects of a treaty agreement on GDP of countries who entered the treaty(...

• Replies: 1
• Views: 1,880
09-01-2015, 11:45 AM
23. ### Applying parametric tests on non-parametric data

Hi all, I'm doing a research and I have some concerns, and I'd appreciate your kind assistance on them. Basically, I'm designing an instrument...

• Replies: 1
• Views: 1,553
08-31-2015, 01:21 PM
24. ### Inaccuracy of Non-Parametric Bootstrap for great sample sizes in Excel-VBA

My aim is to evaluate the performance of parametric and non-parametric Bootstrap under specific circumstances; and particularly their ability to...

• Replies: 0
• Views: 1,418
08-30-2015, 05:15 PM
25. ### Event study analysis significance tests

Dear all This is my first post in the forum. I'm sorry if this question already came up, I used the search function but did not find anything. I...

• Replies: 0
• Views: 1,673
08-28-2015, 04:14 AM
26. ### How to analyse a set of data without normality and homoscedasticity?

Hello, I'm a postgraduate student in Biology. From some time on, I wanted to publish a paper regarding the affectance of temperature to the shell...

• Replies: 0
• Views: 1,094
08-28-2015, 02:08 AM
27. ### Comparing categorical and numerical results simultaneously

Hi all, This question is in regards to options for analysing a dataset. I have a dataset where we have 23 video clips that have been treated using...

• Replies: 0
• Views: 1,238
08-27-2015, 12:17 AM
28. ### Statistical tests for the analysis of acoustic parameters of one speaker

Hello! I would like to address the question regarding the statistics. I am analyzing the relation between the narrow focus and fundamental...

• Replies: 0
• Views: 944
08-26-2015, 05:38 AM
29. ### RCT with several follow-up measures. How to counterbalance the dependent variable?

Hi everyone, I am new here so I hope I post this in the right Sub! Please let me know if there is a better Sub for it- I appreciate your help!! :)...

• Replies: 0
• Views: 1,551
08-20-2015, 07:22 AM
30. ### Statistical Analysis for Master's Thesis

Hello Everyone, So this is my first forum post ever :) probably because I just couldn't figure out solution by myself this time. Thank you in...

• Replies: 6
• Views: 1,885
08-18-2015, 06:34 PM
31. ### cross-tabs or non-parametric independent sample t-test

I have conducted a survey to determine if there is a significant difference in the number farmers and non-farmers which agree to a specific farming...

• Replies: 7
• Views: 2,029
08-17-2015, 01:32 PM
32. ### Seeking help for the interpretation of model fit indices

Hi everyone... Please help me with the following question I'm doing my research that one of it aims is to test the model fit of a particular model....

• Replies: 0
• Views: 1,084
08-16-2015, 07:25 AM
33. ### Seeking help on Inferential Stats

Sir, Please help in the following question.Kindly lay emphasis on the reasoning behind selecting any particular test to solve it. Ques--On an...

• Replies: 0
• Views: 1,296
08-15-2015, 02:18 AM
34. ### Poisson/Gamma model (empirical Bayes), prior distribution parameters calculation

Hello everyone, I want to calculate the α and β estimates of the prior (Gamma) distribution for the Poisson/Gamma model based on the Empirical...

• Replies: 0
• Views: 836
08-14-2015, 01:11 PM
35. ### Exploratory Factor Analysis problems

Independent Variable: 49 state survey of state court administration: how much power does the state court administrator have over 31 separate...

• Replies: 2
• Views: 1,404
08-12-2015, 07:44 AM
36. ### Calculating forecast error for a long-term volatility forecast

Hi, I am trying to calculate the forecast standard error for a long-term volatility forecast of a time series. I am simply using the unbiased...

• Replies: 0
• Views: 1,062
08-11-2015, 05:55 AM
37. ### Power calculation for accuracy tests

Excuse my ignorance I would like to do a simple study. I have 3 screening tests and a gold standard test which will put patients into +ve and -ve...

• Replies: 2
• Views: 1,497
08-10-2015, 02:41 PM
38. ### Multiple Linear Regression or Hierarchical MLR?

Hi team. I will be studying the non-causational relationship between coping and posttraumatic growth in bereavement where: Coping is a single...

• Replies: 0
• Views: 2,212
08-09-2015, 02:23 PM
39. ### Calculating variance for variable derived from two correlated variables

Hello, I am analyzing a dataset based on a survey of organic farmers. Among other things, I have data about the farmer's organic seed usage and...

• Replies: 4
• Views: 1,857
08-07-2015, 04:22 PM
40. ### Bayesian inference with unequal sampling

I have a "two-column" data set, with a multi-class categorical variable A, and two-class variable B. It is assumed that each observation is...

• Replies: 0
• Views: 1,070
08-07-2015, 08:15 AM
41. ### How To Test A Distribution For Normalcy

I'm looking for Visual Basic source code that will, after entering the data of a distribution, test that distribution for being normal or 'almost'...

• Replies: 0
• Views: 1,419
08-06-2015, 08:45 PM
42. ### Research Study

Hello everyone, I would like to ask for help regarding my YES/No Survey. Could somebody me how to compute for this. thanks!!:):):)

• Replies: 3
• Views: 1,770
08-06-2015, 07:50 AM
43. ### Kolmogorov-Smirnov vs. Kuiper test

Hello, I would like to compare two 2D distributions with quantitative variables, illustrated here: For each "x", they are several measures...

• Replies: 7
• Views: 1,982
08-06-2015, 07:48 AM
44. ### Need help picking a statistical procedure

Hello all, We have collected quite a bit of data and we would like to write it up as a study, but we are having trouble determining which...

• Replies: 4
• Views: 1,534
08-06-2015, 07:46 AM
45. ### Not sure what statistical test to use

Hello: I have a couple of questions regarding what statistical test I should choose. Any help on this would be greatly appreciated! Break down on...

• Replies: 0
• Views: 1,646
08-05-2015, 09:24 AM
46. ### maximizing probability that one variable is greater than another

hi, There is a random variable X with a known distribution along its support interval, say, . Need to find a distribution function of another...

• Replies: 2
• Views: 1,946
07-29-2015, 07:18 AM
47. ### What statistical analysis tests to use for these 3 questions

1. Examining the effects of being a victim of violence (categorical yes/no) on hostile attribution scores (continuous variable)? 2. Examining the...

• Replies: 3
• Views: 2,211
07-29-2015, 03:10 AM
48. ### multiple measurements per condition for a repeated measures ANOVA

I want to know whether I can use the repeated measures ANOVA for my analysis - I collected from 1 to 6 data points per condition from each of 13...

• Replies: 2
• Views: 1,029
07-29-2015, 02:58 AM
49. ### Multiple Comparisons across events with discrete probabilities?

Been stuck on this problem for a few days. I have calculated many distributions that are all non-parametric, but appear to have trended to be...

• Replies: 0
• Views: 1,285
07-22-2015, 10:33 AM
50. ### post-hoc for nonparametric paired data in groups of unequal sizes

I am trying to do post-hoc analysis for nonparametric data. The group sizes are unequal but are paired. I've found several tests online,...

• Replies: 5
• Views: 2,442
07-22-2015, 09:54 AM
51. ### correcting for early user bias

Okay, forgive me if this is in the wrong place. Feel free to move it if it isn't. And please forgive me as I know VERY little about statistics and my...

• Replies: 7
• Views: 2,364
07-20-2015, 08:24 PM
52. ### Transformation of panel count variables with multitude of zero values

Hello dear forum members! For a panel of 1,700 physicians observed from 2009 to 2013, my data includes two variables -- number of favorable(fav)...

• Replies: 3
• Views: 2,046
07-20-2015, 04:05 PM
53. ### methods for selection a subset of population to measure biomarkers

Hi! In a quite large time-to-event clinical trial project, the population is very large (more than 1,000 people). I want to measure the subjects'...

• Replies: 1
• Views: 984
07-20-2015, 03:09 PM
54. ### stat test

I want to test the following hypothesis. Which test would be appropriate to test it? H1: The Millennials in YMCA Central Florida score lower in...

• Replies: 1
• Views: 1,616
07-18-2015, 12:12 PM
55. ### Error with Skillings-Mack test in R

I was trying to perform a Skillings-Mack test in R and can only get error message saying "Error in split.default(x = seq_len(nrow(x)), f = f, drop =...

• Replies: 0
• Views: 2,730
07-13-2015, 12:12 PM

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