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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: 18,760
10-11-2014, 12:02 PM
1. ### What should I use if I want respondent regression coefficients to predict the group?

I have 3 hundred rows of data. Each row represents a unique person. I have a total of 38 columns of data where column 1 is the person, columns 2-37...

• Replies: 0
• Views: 1,034
06-05-2013, 02:25 PM
2. ### 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...

• Replies: 2
• Views: 1,387
03-13-2017, 04:52 PM
3. ### 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...

• Replies: 1
• Views: 3,436
04-28-2009, 01:13 AM
4. ### What statistical analysis or methods to use?

I'm trying to learn a bit here and I'm experimenting on some data I have available. The data is user records with data appended to each record that...

• Replies: 0
• Views: 1,176
12-02-2013, 10:11 AM
5. ### 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: 2,143
07-29-2015, 03:10 AM
6. ### 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?

• Replies: 7
• Views: 2,354
09-20-2012, 12:48 PM
7. ### what statistical techniques to use?

Hello all, I am really new to this, so please bear with me. In essence, I am looking at whether poor institutional performance encourages...

• Replies: 0
• Views: 1,330
07-09-2013, 07:12 PM
8. ### What statistical test and software to use for a Japanese reading comprehension exper?

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• Replies: 0
• Views: 2,059
10-31-2010, 10:29 AM
9. ### What statistical test do i need to run?

Hi there folks, I'm having a little difficulty choosing what statistical test i need to run, I've conducted a series of behavioural experiments,...

• Replies: 0
• Views: 1,171
12-16-2013, 06:56 PM
10. ### What statistical test do I use to tell if my data statistically significant?

This is for a PhD experiment I am working on. I have 5 types of rock samples. I am trying to understand how their ability to preserve a type of...

• Replies: 0
• Views: 1,068
03-27-2015, 08:12 PM
11. ### What statistical test do I use?

Hi there, I'm doing a study on the influence of sexuality on a camouflaging questionnaire which has a score rating (0-40), so is an interval...

• Replies: 1
• Views: 2,896
01-07-2017, 10:12 PM
12. ### What statistical test should I use for this data?

Two groups (group A; group B) are given two treatments (M) and (B), and a control (Control) in different orders. Then the weight of food they consume...

• Replies: 1
• Views: 1,745
12-30-2013, 10:46 AM
13. ### What statistical test should I use to check to ratio?

I have data for two sets of sample in the form of frequency of three category.Say A,B & C are three category and I have data for sample 1 as ...

• Replies: 6
• Views: 14,948
02-16-2011, 01:37 PM
14. ### What statistical test should I use to test for statistical significance?

Hello fellow members, I haven't been using statistics for a long time and I have trouble recalling statistical tests and their use. I hope you can...

• Replies: 1
• Views: 1,433
04-18-2016, 01:48 AM
15. ### What statistical test should I use?

I have created high and low variables from 1 variable. I want to see whether the mean of the "high" subjects differs from the mean of the "low"...

• Replies: 4
• Views: 2,856
02-09-2011, 05:19 AM
16. ### What statistical test should I use?

I've recently collected data as part of my university course to answer the question 'Does social structure in captive meerkats affect behaviour and...

• Replies: 2
• Views: 1,479
05-16-2013, 08:17 AM
17. ### What statistical test should I use?

I am wondering which statistical test I should use to analyse my data. I have 11 different individual sharks and energy data for each of them. The...

• Replies: 0
• Views: 1,228
09-24-2013, 09:39 AM
18. ### What stats test to use?

What test to use!? I have a data set in which I want to test if there is a difference between the means of a continuous variable for three...

• Replies: 0
• Views: 1,582
12-15-2011, 04:45 AM
19. ### What test can I use to compare categorical and continuous variables?

Hello guys: I have two sets of data, actual outcome (live vs. dead), which is categorical, and a risk adjustment predicted outcome, which is...

• Replies: 14
• Views: 13,055
08-09-2011, 02:58 PM
20. ### What test should have been used...

Done with the assignment ... No replies :(

• Replies: 0
• Views: 1,394
10-15-2013, 08:35 PM
21. ### what test should i use for analysis of data from rct

Hi I am writing a research proposal It is a rct that hopes to refute the null hypothesis the use of clary sage will have no effect on...

• Replies: 2
• Views: 2,252
10-24-2013, 04:29 AM
22. ### What test should I use to analyze my data?

I'm currently a fourth year university student. As part of my studies, I'm taking a class called Capstone, where students design and carry out a...

• Replies: 1
• Views: 2,634
11-05-2013, 05:27 PM
23. ### What test to compare class data?

I have given a pre and post test to two classes. One class did a particular activity (experimental group) and one class did not (control group). ...

• Replies: 0
• Views: 1,366
10-26-2013, 02:30 PM
24. ### what test to do?

Hi Would be grateful for a little guidance. I have a set of data with a mix of continous and categorical data I am trying to see if there is...

• Replies: 1
• Views: 1,977
05-24-2009, 03:05 PM
25. ### What test to identify words used more frequently by one group than another?

I have two groups of subjects, A and B. I have a text sample produced by each subject. My goal is to idenitfy those words that are used significantly...

• Replies: 6
• Views: 1,616
07-29-2013, 03:23 PM
26. ### what test to use?

I have a data set consiting of 50 vegetation plots. I have five possible categories for vegetation cover. Each category can range form 0 to 100% with...

• Replies: 2
• Views: 2,654
05-22-2009, 09:00 AM
27. ### 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...

• Replies: 2
• Views: 1,826
08-27-2012, 09:30 AM
28. ### What test to use?

I'm glad I found this group. I'm currently studying on butterfly's garden preferences based on the number of butterflies caught in the area. I...

• Replies: 2
• Views: 1,153
06-20-2013, 12:04 PM
29. ### What test?

HI! Thanks to anyone that is reading this!! I am a masters student and I am trying to figure out what test I should use to analyze some of my...

• Replies: 1
• Views: 2,216
07-26-2008, 10:26 PM
30. ### What tests and analysis for 50 year data collected on fashion trends

So, it is said that whatever is in fashion once comes back someday or the other. We have collected data on 10 different garment types, each having 5...

• Replies: 1
• Views: 720
08-25-2016, 10:31 AM
31. ### What tests should I use to analyze my data? Immediate input appreciated

Hello TalkStats members :wave: I have some data I need to analyze. I first would like to say I hope I am posting this in the correct sub-forum,...

• Replies: 2
• Views: 4,278
04-10-2011, 07:13 PM
32. ### What tests should I use when my moderator is discrete?

Hello everybody, I am currently in the final phase of my master thesis. I have collected my data and I am trying to do my statistical tests, but I...

• Replies: 0
• Views: 1,005
01-14-2016, 10:38 AM
33. ### what to do for unknown PDFs.

Hi guys 1) When we are performing signal detection , and we have received this y(n)=x(n)+z(n) for n=0,1,2,3...., where z is gaussian noise, but...

• Replies: 0
• Views: 4,039
04-12-2011, 10:59 PM
34. ### What to do if sample size is too big? (ttest)

So I'm running ttests for a descriptive statistic table and all my results are significant, but I"m concerned that the sample size is too big 3,880...

• Replies: 5
• Views: 6,124
02-01-2014, 05:47 PM
35. ### What to do when number of variables is greater than number of observations?

What are some techniques that are utilized when the number of predictors is greater than the number of observations?

• Replies: 15
• Views: 6,774
02-15-2013, 02:36 PM
36. ### What to do when survey participants answer all '4's?

I reached out to members of my organization to rank how they felt the company was performing on various topics, about 35 questions in total. Several...

• Replies: 8
• Views: 1,607
07-09-2015, 12:24 PM
37. ### What to do with unequal sample sizes?

I am working on this time-effect project in which we pulled data at different time points from a big old data set. The issue is that all subjects...

• Replies: 2
• Views: 1,858
07-09-2015, 12:01 PM
38. ### What to review before starting a PhD in statistics?

Hello everyone, I will be starting a PhD program soon on a topic mainly related to bayesian statistics, sequential Monte-Carlo methods and...

• Replies: 1
• Views: 1,154
02-27-2013, 10:55 AM
39. ### What type of analysis??

The purpose of my experiment was to study how ultraviolet radiation effects the quality of eggs. My explanatory variables are: 1) The distance at...

• Replies: 1
• Views: 2,077
03-29-2011, 07:11 PM
40. ### What type of ANOVA test should I do?

The same participants are exposed to two different screen sizes 27" (stimulus A) and screen size 9.7" (stimulus B). Independent var is "screen" with...

• Replies: 3
• Views: 1,268
08-28-2016, 07:31 PM
41. ### What type of sampling is this?

Hi, I have some confusion about the kind of sampling I'm using. I started choosing manufacturing sector and within it chose 4 industries. Later I...

• Replies: 6
• Views: 2,294
06-21-2012, 10:30 PM
42. ### What type of test should I use?

I am trying to determine whether being involved in an extracurricular activity has an impact on different course grades (dependent variable),...

• Replies: 2
• Views: 1,162
11-14-2015, 04:39 PM
43. ### What would be the appropriate statistical tool?

Dear all, I am a graduate researcher in the analysis phase of my research work. My research is an intervention research (n=14) trying to analyze the...

• Replies: 3
• Views: 2,568
01-11-2017, 06:17 AM
44. ### 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....

• Replies: 6
• Views: 2,932
11-28-2014, 08:13 PM
45. ### What's the name of this distribution? (pdf ~ gaussian times x)

Hi My apologies if this a simple question but, despite extensive searching, I seem unable to find an answer and I don't know the correct terms to...

• Replies: 4
• Views: 1,245
12-17-2012, 03:14 AM
46. ### What's the null hypothesis here.

I need to do a hypothesis test on the mean of bicycle hire lengths in London, the expectation is that the mean hire shouldn't exceed 60 minutes. ...

• Replies: 5
• Views: 2,891
03-21-2012, 02:30 PM
47. ### 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...

• Replies: 0
• Views: 3,538
11-26-2008, 09:34 AM
48. ### when Bootstrap Correlation coefficient (Pearson) con be used?

Hi! Though I know the mechanics of the bootstrap methods, I am do not manage to find in literature a clear-cut explanation about when and in what...

• Replies: 0
• Views: 4,106
10-26-2010, 06:19 AM
49. ### When do we use...

just out of curiosity.... where is Mathematical Statistics, if at all, do we use modern algebra (i.e Groups, Rings,....) ?

• Replies: 3
• Views: 2,361
09-11-2010, 10:33 AM
50. ### When homogeniety of regression slopes (for ANCOVA) is significant.

HI, I have conducted an ANCOVA and have a significant interaction when testing the homogeniety of regression slopes assumption. My IV is Group...

• Replies: 0
• Views: 1,332
03-19-2012, 11:45 PM
51. ### When is standardisation of data necessary?

I am running regression analysis and cluster analysis on a data set. The variables differ in their scale of measurement – some variables are ratings...

• Replies: 0
• Views: 1,119
11-20-2013, 03:32 PM
52. ### Where do I start?

Hi! I'm feeling overwhelmed here and don't know where to start. It is the second message regarding my project and any additional help would be...

• Replies: 1
• Views: 3,197
01-21-2009, 09:40 AM
53. ### Where to find data (morning running vs evening running)?

Hi, I am trying to do some analysis on running time: morning vs evening. Does anyone know where I can find data? Thanks in advance. John

• Replies: 9
• Views: 2,701
05-02-2012, 05:42 PM
54. ### Where to send an education methods piece

I'm writing a piece that introduces a new correlation like measure between time periods. I would like to get this one published somewhere. The...

• Replies: 2
• Views: 1,174
05-18-2013, 02:20 AM
55. ### Where to start?

I am trying to find the best way to identify the optimal quantity for packaging that reduces handling of product. example: Product 1 ...

• Replies: 2
• Views: 1,458
11-30-2011, 03:17 PM
56. ### whether opinion differes among respondents from different group

I want to test whether response differ among groups regarding e-government interoperability. There are 14 itens regarding interoperability (Likert...

• Replies: 1
• Views: 2,293
02-16-2011, 03:26 AM
57. ### Which analysis fits this research?

Hi everyone! Apparently, evertbody in the forum seems to have quite some knowledge already, while I am only posting a rather easy questoin. I...

• Replies: 0
• Views: 1,151
05-07-2014, 03:05 AM

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