1. Announcement:
05-10-2017
Views:
1,961
Page 17 of 54 First 1 2 3 4 5 6 7 8 9 10 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 ... Last
Threads 961 to 1020 of 3195

# 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: 18,803
10-11-2014, 12:02 PM
1. ### Autocorrelated measurements with autocorrelated errors, covariance term

Dear all interested stats people, I encountered the following situation for error propagation of a time series. 1.) Given a time series...

• Replies: 0
• Views: 1,510
08-11-2012, 07:43 AM
2. ### analysis over all items OR by-subject OR by-items analysis?

Hi, Let's say you have a data set of for instance 20 subjects who all answered 15 questions. Every question is one items that is either correct...

• Replies: 1
• Views: 1,594
02-20-2015, 10:22 AM
3. ### Multiple Imputation of Pre-Composite Scores

I'm running the analysis on a study that used questionnaires. Several items on the questionnaires can be added to come up with composite scores of a...

• Replies: 4
• Views: 3,269
03-02-2012, 06:33 PM
4. ### 'Mean location/ spot'

I have a design that need to have mean of different spots, in simple term it would be like this. P1 shoot 6 and P2 shoot 8 out of 16 neighboring...

• Replies: 0
• Views: 1,671
07-25-2011, 12:45 AM
5. ### need help for senior thesis/ NCHA data

I am doing a senior thesis. I will be using secondary data from the NCHA. I want to see if there are gender differences in abusive relationships....

• Replies: 3
• Views: 1,511
02-24-2014, 08:23 PM
6. ### kaplan-meier from a survival function

hi, let assume I have a survival function, given as a solution from a continuous model. To be precise, the cumulative hazard is calculated, Ch(t),...

• Replies: 0
• Views: 1,650
05-11-2012, 12:16 PM
7. ### exponential EWMA- statistical process control to monitor time between events

I am looking into control charts to monitor time between events for rare events. A quick literature review revealed that the following four methods...

• Replies: 0
• Views: 1,445
02-06-2014, 04:10 AM
8. ### PCA and symmetric distribution.

Hello, I hope you can clarify my doubts. I'm an Italian student of business administration. For my thesis I study the application of PCA method for...

• Replies: 1
• Views: 1,730
10-11-2013, 04:34 PM
9. ### Panel Data - Pooled OLS vs Fixed Effects vs Random Effects

Hi forummers, I am a finance PhD student and am currently undertaking some statistical analysis of bankruptcy risk. I have data on roughly 500...

• Replies: 2
• Views: 79,010
03-09-2012, 01:54 PM
10. ### Goodness of fit for 2D histograms

Hello all, I've dragging this problem for quite a while now and I'd really appreciate it if someone could help me whit it. I have two sets of...

• Replies: 0
• Views: 1,720
04-11-2012, 07:11 AM
11. ### Help with multidimensional scaling for multiple DVs

Hello statistics experts! I couldn't find an answer to my question so I thought that one of you might know: I have 14 risk sources, like nuclear...

• Replies: 1
• Views: 1,633
01-01-2016, 12:39 PM
12. ### 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....

• Replies: 1
• Views: 1,310
10-05-2012, 11:30 AM
13. ### Is ANOSIM appropriate for my question?

I'm doing a microbial ecology experiment setup as follows: Six barrels have been filled with different substrates. Water from the environment flows...

• Replies: 0
• Views: 1,118
02-12-2014, 08:15 AM
14. ### Help with multivariate (MCA) analysis graph interpretation

Hi All, Thanks in advance for any insight you can offer!! I’ve been tasked with analyzing possible correlation between various quantitative...

• Replies: 1
• Views: 4,019
01-06-2012, 07:44 PM
15. ### Wilcoxon rank sum test on Cross Validation Results

Hi Guys, I would like to compare the recognition times of two different object detectors. I have let's say 1000 labeled data. Then I do a 10x...

• Replies: 2
• Views: 2,599
01-31-2012, 03:33 AM
16. ### 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: 1,070
03-27-2015, 08:12 PM
17. ### 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...

• Replies: 2
• Views: 1,265
09-30-2012, 11:35 PM
18. ### Any stats tests I can run to show inconsistency/ no correlation?

Hi, I am doing my msc dissertation and I have gathered 204 responses to a questionnaire with one of the main questions being what exercises specific...

• Replies: 6
• Views: 1,611
06-06-2014, 06:13 PM
19. ### Identify the causes for a phenomenon

Hi everyone. I would like to investigate the relationship of different factors to a phenomenon. Saying I have traffic accidents (1 or 0) with...

• Replies: 0
• Views: 3,778
11-26-2013, 08:39 PM
20. ### Help for Web Log stats on blog site...

Hello, I have been asked to run an on-going, weekly statistics rankings of topics on a website (blogs). Each blog author lists 'topics', selected...

• Replies: 1
• Views: 2,406
11-10-2009, 03:01 PM
21. ### ICC and Factor scores

Dear All, I am computing Inter-class correlations (ICC) for a multilevel comparison of geographical areas. I have a long list of indicators and for...

• Replies: 0
• Views: 2,039
gav
01-06-2012, 08:17 AM
22. ### Factor scores to classify groups?

Hi there, I have carried out a principal component analysis and I would like to use the factor scores to classify 5 groups of respondents. What...

• Replies: 0
• Views: 2,111
gav
01-16-2012, 10:03 AM
23. ### Factor analysis question

Hi, I was hoping somebody might be able to help with a question about factor analysis. Is there a problem with putting three different groups (of...

• Replies: 1
• Views: 1,429
12-30-2013, 12:42 PM
24. ### Correlations among responses to a forced-choice scale

I have data from participants who rate emotional content of pictures. Specifically, people see 20 pictures of abstract paintings (one at a time) and...

• Replies: 3
• Views: 2,249
04-08-2013, 06:43 PM
25. ### Request for help on deciding how to analyse some data

I have a group of students who have data for % Attendance before and % Attendance after These students can be split by various factors, depending...

• Replies: 2
• Views: 2,166
08-30-2011, 03:02 AM
26. ### Finding degree of difference

I am given two sets of data collected by two different people. The data in includes the variables area, production and productivity of coconut. Now,...

• Replies: 2
• Views: 1,486
07-10-2015, 01:54 AM
27. ### [ASK] [Quantification Theory Type I] Kansei Engineering Reference

Hi everyone i've been doing a research about kansei engineering for automobile product, and to analyze the data, i need to perform quantification...

• Replies: 1
• Views: 3,243
03-11-2015, 05:17 PM

Hello I am working with a likert scale with response ranges from 1-5. A score of '3' indicates a neutral response. I want to calculate whether,...

• Replies: 5
• Views: 6,521
10-06-2008, 07:40 PM
29. ### best presentation of data to aid analysis

Hello, I need some help with formulating a methodology for my current dissertation. I am investigating the impact of ability setting on students....

• Replies: 0
• Views: 2,199
03-12-2009, 02:02 AM
30. ### 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...

• Replies: 0
• Views: 1,403
11-21-2014, 12:08 AM
31. ### Stores and ordered rank of products

I have data about popularity of some products in some stores. For each of the stores I have only a ordered rank of best-selling products in them. I...

• Replies: 3
• Views: 1,325
08-16-2014, 08:34 PM

Hi to all. I desperately need a method to compare positive and negative likelihood ratios of a diagnostic test within two strata (e.g. likelihood...

• Replies: 0
• Views: 2,832
07-13-2009, 07:20 PM
33. ### What is the best practice on categorizing free-text survey one-liners?

Dear all, I am currently analyzing the free-text component of a satisfaction survey using SPSS Text Analytics. A lot of our questions were...

• Replies: 0
• Views: 1,350
05-23-2013, 03:49 AM
34. ### 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...

• Replies: 0
• Views: 1,135
02-26-2017, 02:38 PM
35. ### Is ANOVA applicable? If not what Statistical Tool woud you recommend?

I am conducting a study to see whether differences exist among different age groups (10 year interval) to serious injuries. As far as I know, in...

• Replies: 4
• Views: 2,279
08-23-2013, 12:36 AM
36. ### Do I have to test normality?

I have an experiment contains 10 students and 2 experts. I want to test if the average of students evaluation for the 1st question is similar to...

• Replies: 2
• Views: 1,264
03-03-2015, 11:55 AM
37. ### Pooling and a posteriori

Sorry if I am posting this in the wrong forum, administrators feel free to move my thread! I am having some difficulties understanding when to use...

• Replies: 1
• Views: 969
04-16-2013, 07:16 AM
38. ### Generalised Lambda Distribution

Hello, Can anyone help me, I am trying to use the Generalized Lambda distribution to model some parts in an assembly, but apart from Wikipedia...

• Replies: 7
• Views: 290
Yesterday, 03:00 AM
39. ### sample size calculation

I am trying to determine the necessary sample size I need for a study. Standard 80% power and </= 0.05 p value. The study is designed to use two...

• Replies: 1
• Views: 2,411
03-06-2015, 02:47 AM
40. ### Analysis of Variance.

Hi all, I have a one question about the analysis of variance. If I have to variables (e.g. A &B) and I want to deal with them as covariate to...

• Replies: 1
• Views: 1,861
02-04-2012, 04:42 PM
41. ### Testing Research Hypothesis

Hi All, I would like to ask about the best method to test the hypothesis research. I have 2 ethnic groups (both gender) and I want to know the...

• Replies: 4
• Views: 2,825
11-15-2011, 08:59 AM
42. ### Homogeneity of Variance

Hi all, I want to test the Homogeneity of Variance (HV) before conducted MANOVA, and I have to groups (different nationality; Arabs and British)...

• Replies: 1
• Views: 1,969
11-26-2011, 06:46 PM
43. ### Analysis of Covariance

Hi everyone, I would like to ask a question about the type of scale (e.g. categorical , continues variable) that should be use as a covariate. I...

• Replies: 0
• Views: 1,032
04-10-2012, 10:08 AM
44. ### Groups split /Low and High

HI ALL, I would like to ask about the best and accurate way to dividing groups as low and high. And how I can conducted this analysis using the...

• Replies: 0
• Views: 1,065
05-02-2012, 09:19 AM
45. ### T-test question

Hi there. I have one Q need some advice on it. In my research, I have 2 national groups (British and Saudi) and I need to compare between them in...

• Replies: 7
• Views: 1,894
11-28-2012, 11:44 PM
46. ### Testing Mediation

Hi All, I have a general question about the Mediation analysis using Hayes Soble test. My Question is : If there is no correlation between path b...

• Replies: 0
• Views: 1,216
02-16-2013, 02:04 PM
47. ### Correlation and Regression

Hi all, I have a question about the significant p value in both correlation and regression. Is there any difference between the p values in both...

• Replies: 4
• Views: 1,576
04-10-2013, 02:37 AM
48. ### Mediation Analysis

Hi All, Could any one explain for me what is the exact differences between full Mediation and partial Mediation? With some example please. Many...

• Replies: 2
• Views: 1,439
04-03-2013, 11:38 AM
49. ### Regression

Hi All, I have a quick question about the correlation before conducting regression. If there was no correlation between x and y, is there any...

• Replies: 8
• Views: 1,451
04-12-2013, 03:12 PM
50. ### Mediation Analysis

Hi All, Could any one explain to me the idea around the correlation in the Mediation Analysis (MA)? I have conductedA the Bootstrapping analysis...

• Replies: 0
• Views: 1,318
06-09-2013, 01:49 AM

Page 17 of 54 First 1 2 3 4 5 6 7 8 9 10 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 ... Last

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.

Note: when sorting by date, 'descending order' will show the newest results first.