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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: 18,645
10-11-2014, 12:02 PM
1. ### Anova

Develop two-null hypothesis tests to ascertain if there are any statistical variances in the averages of bus route times and any statistical variance...

• Replies: 2
• Views: 4,767
09-02-2008, 03:38 AM
2. ### Anova & post hoc analysis

wrong forum

• Replies: 0
• Views: 1,470
11-15-2013, 09:39 PM
3. ### ANOVA - which one to use?

Hello, we are doing an experiment where body consistence (weight, proportion of muscles, fat, water in body etc.) is measured. We have 103...

• Replies: 3
• Views: 1,642
10-28-2015, 02:38 AM
4. ### ANOVA and quadratic terms?

Hello everyone! I have what I think is a relatively straight-forward 3-way factorial ANOVA design. One of my factors (which is "number of...

• Replies: 7
• Views: 4,758
01-21-2013, 11:33 PM
5. ### ANOVA and Tukey comparisions

Hi! I'm using Minitab to run ANOVAs for a recent psycholinguistic experiment. My problem is that some interactions aren't even close to significant...

• Replies: 0
• Views: 1,100
08-16-2014, 05:21 PM
6. ### ANOVA Assumptions for Percentages

I am trying to analyze land use data (e.g. an given area is made up of 14% residential land, 36% agricultural land, and 50% forested land). So the...

• Replies: 1
• Views: 9,681
01-29-2010, 10:30 PM
7. ### ANOVA Design and Analysis

Hello, This is my first post so I hope my question is appropriate for the group. I have performed an experiment where we have blood samples...

• Replies: 1
• Views: 1,392
12-02-2011, 02:33 AM
8. ### ANOVA help? :)

Basically i have two sets of data collected from two different locations. I know that both sets of data are not normally distributed, so they will...

• Replies: 5
• Views: 1,115
02-13-2013, 05:32 PM
9. ### ANOVA n00b questions

Hello! I'm putting together a proposal and would like to conduct a certain type of analysis but my wording on this is rather weak so please correct...

• Replies: 20
• Views: 4,296
11-07-2011, 10:09 PM
10. ### ANOVA not significant but Tukey is

I'm still new to stats and would like to know if the results below indicate significance, or at least a trend. Being compared are three independent...

• Replies: 1
• Views: 3,275
02-08-2015, 09:48 AM
11. ### ANOVA of factor analysis results

Hello, new to the forum, and I'm in a bit of a bind with some data analysis for my thesis. I have conducted Principle Axis Factoring (using SPSS,...

• Replies: 0
• Views: 3,714
02-01-2011, 12:39 AM
12. ### ANOVA on the sampling distribution instead !

I am comparing 7 different types of stochastic algorithms. Each algorithm's performance is represented by a value (called the COST). The lower the...

• Replies: 0
• Views: 2,859
04-14-2010, 02:29 PM
13. ### ANOVA or Correlational analysis? Which one to use?

Hello everyone, I am currently working on my dissertation and aim to identify the relationship between parent-child interaction and behavior of...

• Replies: 4
• Views: 1,651
10-22-2015, 06:35 AM
14. ### ANOVA or MANOVA

Hi, I have a question on which statistical test to use for 2 separate problems: 1) I have 4 different groups, 1A, 1B, 2A and 2C and have 3...

• Replies: 1
• Views: 1,861
05-07-2014, 05:41 AM
15. ### ANOVA or Regression? and how to put data in SPSS in order to perform the test?

I am doing research about recycling and want to know the relationship between recycling costs of some electronic products and the composition of...

• Replies: 0
• Views: 1,277
07-20-2013, 09:28 PM
16. ### Anova or t-test on squared errors

I have two forecasting models, moving average and single exponential smoothing. The values of Mean Absolute Percentage Error (MAPE) is 5.2%, 5.8%....

• Replies: 0
• Views: 1,375
03-16-2016, 05:13 AM
17. ### 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...

• Replies: 2
• Views: 1,690
03-01-2017, 12:20 PM
18. ### Anova test?

I have data for 09,10, and 2011. I have an exertion level for each individual. My indivduals are classified by the shift they work (8 day, 8 night,...

• Replies: 4
• Views: 2,193
11-07-2011, 09:34 AM
19. ### ANOVA v t-test

My understanding is that the t-test is a special case of a oneway ANOVA. I am confused by highly discrepant results when comparing the means of 2...

• Replies: 2
• Views: 3,986
05-10-2009, 09:12 PM
20. ### ANOVA vs Kruskal-Wallis for combined normal and non-normal data

I have a number of distributions that I need to determine significant differences. However, some distributions are normal and some are not. In order...

• Replies: 1
• Views: 199
08-16-2017, 04:14 AM
21. ### ANOVA vs. T-Test --> completely different results

If I compare three treatment groups with ANOVA (and Bonferroni posttesting), I get no significant difference results between groups (p>0.05)......

• Replies: 7
• Views: 18,210
06-14-2011, 12:14 AM
22. ### ANOVA weighted means?

Hi Chaps, I am trying to run a comparison between two groups - patients and staff - ratings of the quality of life on a ward. Simple enough,...

• Replies: 3
• Views: 5,749
06-05-2009, 12:15 PM
23. ### 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...

• Replies: 4
• Views: 1,982
03-03-2017, 01:37 AM
24. ### ANOVA with post hoc

Would this study design be sufficient? I would like to study the efficacy of countermeasure versus a polygraph: Use 30 polygraph operators, 10 of...

• Replies: 0
• Views: 901
01-11-2015, 07:37 AM
25. ### ANOVA with repeated measurement: multivariate tests; MANOVA for repeated measures

Hello everyone I need help with my analysis of variance with repeated measurement. I did a study where I measured 6 values of every participant...

• Replies: 0
• Views: 1,137
08-05-2014, 07:32 AM
26. ### ANOVA with subject id's as variables?

Hi everybody, I work in sleep research and it is usually of interest to us to compare variables between different sleep stages (wakefulness, N1,...

• Replies: 6
• Views: 2,542
03-27-2012, 04:01 PM
27. ### Anova without intercept?

Is it possible to perform Anova without an intercept? In the software, there is an option to check the box that says “no intercept”. Once I do...

• Replies: 3
• Views: 3,517
10-31-2016, 03:02 PM
28. ### ANOVA without random variables?

I am making a preliminary selection of algorithms to use for recognizing a collection of objects in images. I have a simulation that creates a set...

• Replies: 0
• Views: 2,280
01-08-2007, 09:17 PM
29. ### ANOVA, Mann-Whitney or both?

I want to calculate the statistics of a clinical study with SPSS. 4 groups with 16 variables and I want to compare the mean values of every...

• Replies: 0
• Views: 1,500
DaH
10-02-2013, 07:57 AM
30. ### ANOVA, residual normality assumptions

Hi everybody, I would like to ask you something about the normality hypotesis on the residuals when performing an ANOVA. Do I have to check the...

• Replies: 0
• Views: 1,805
10-09-2012, 06:25 AM
31. ### ANOVA: )Genre of Series (IV) +Gender (Moderator) effect on Purchase Intention (DV)

Hey, In my research I have as IV the Genre of the series (comedy vs drama). The moderator is Gender. And I want to see how this effects purchase...

• Replies: 4
• Views: 1,463
12-16-2013, 11:21 AM
32. ### 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...

• Replies: 0
• Views: 1,060
03-10-2017, 06:38 PM
33. ### Any difference between online and newspaper advertisement on books selling?

An owner of 2 bookstores B1 and B2 used 2 ways for new books advertisement. B1 advertised online, while B2 advertised in newspapers. The owner wants...

• Replies: 0
• Views: 904
03-06-2014, 08:03 AM
34. ### 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: 1,585
06-06-2014, 06:13 PM
35. ### Any suggestion: book on score test?

Hi. I'm trying to understand what is a score test to test certain model based on discrete distribution. So far i manage to find only score statistic...

• Replies: 0
• Views: 2,079
05-04-2011, 09:05 AM
36. ### Any way to test significance?

First off, pardon my novice-level knowledge of statistics. If I make any ridiculous assumptions or whatever, this is why! So I'm doing a bit of...

• Replies: 7
• Views: 3,344
03-07-2011, 02:59 AM
37. ### Anyone know the English title of the translated "Calculus of Probability" by Markoff?

Hi, first post to the forum here for me :) Markoff, A. A. Calculus of Probability (Russian Editions II and IV , German Edition ) I am...

• Replies: 0
• Views: 762
09-22-2013, 02:41 PM
38. ### AOV-How worried do I need to be about non-normal and unequal residuals

I am working on a 3 by 8 factorial design with limited replication (5). I was handed this data set by someone who left my department and want to see...

• Replies: 0
• Views: 2,210
11-02-2011, 12:59 AM
39. ### APA report format

I have performed the Welch ANOVA due to the violation of homogeneity of variance. The df shown in spss is (2,164,078) Should I report this value,...

• Replies: 0
• Views: 1,047
12-12-2015, 08:21 AM
40. ### API for Australian Bureau of Statistics

Ok so there are APIs for US census data where you feed it geodata and get back a whole bunch of demographics data back. I use...

• Replies: 0
• Views: 2,400
09-16-2014, 06:26 PM
41. ### Applicability of Bayes to Contingency Tables (Chi-Squared)

Is it possible to apply the Bayes factor to tests of/for independence/homogeneity (Chi-Square)? You can find a file below. The contingency table...

• Replies: 1
• Views: 2,718
10-25-2016, 08:18 AM
42. ### Application of Significance Testing

SAMPLE SIZE: 518 in each city QUESTION: Likeness to have Coke after dinner. Positive Response to the Question: 320 in each city ...

• Replies: 6
• Views: 5,661
12-08-2010, 12:54 AM
43. ### Application of statistics for sample of a population (Urban Renewal)?

I am bachelors student working on a report regarding Urban renewal. I am given a certain area to study. Study area include the socioeconomic aspects...

• Replies: 1
• Views: 926
04-04-2013, 05:04 AM
44. ### 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: 1,434
08-31-2015, 01:21 PM
45. ### Appropriate analyses for social psychological study of relationships

Hi, I collected cross-sectional data on personality and attitude variables for a social psychology research project and now I will be doing the...

• Replies: 0
• Views: 718
01-26-2014, 02:05 PM
46. ### Appropriate form of ANOVA when blocking

Hi, I'm new to this forum (and relatively new to statistics) and have a question :) I have a text book that outlines the following experiment: ...

• Replies: 3
• Views: 1,639
06-21-2012, 03:51 AM
47. ### Appropriate method for research model

Hi guys! Please i need your advice! I have developed a model about some factors that influence the desire of members to share information is...

• Replies: 16
• Views: 5,991
07-26-2011, 10:11 PM
48. ### Appropriate Method for Researching the Motives behind a Decision

Hello, I am interested in studying the motives behind a particular decision. This would be a onfirmatory study. According to the theory I will...

• Replies: 2
• Views: 2,221
Sta
07-30-2011, 03:22 AM
49. ### Appropriate sample size for unusual "populations"

There seems to be a lot of literature about determining sample size based on population, margin of error and confidence level. This seems difficult...

• Replies: 2
• Views: 871
08-16-2016, 08:22 PM
50. ### Appropriate Statistical Analysis

Hello, I am getting ready to take comprehensive exams for my Master's Degree and have not had statistics in four years. I need some assistance in...

• Replies: 4
• Views: 4,005
03-04-2009, 12:39 AM
51. ### Appropriate statistics where dataset contains only positive cases?

Sorry if this sounds confusing or uses the wrong terminology, I'll do my best to explain. I have a data set of approximately 100 records, where...

• Replies: 4
• Views: 1,773
04-08-2014, 02:51 PM
52. ### Appropriate test for quantitative content analysis of one newspaper

Hi everyone, I am examining the differences in media coverage of homicide on the basis of the religion of the victim (bias). The sample is one...

• Replies: 4
• Views: 1,348
05-22-2016, 07:15 AM
53. ### Appropriate test for two treatment types with zero-inflated data

Hello all, I am trying to determine if there is a difference in falcon abundance between inside a forest reserve and outside the reserve. I ran...

• Replies: 1
• Views: 1,281
01-14-2015, 06:48 PM
54. ### Appropriateness of logistic regression

Hello, I am interested in the effects of gender on a set of variables. I have run a number of group mean t tests (with gender as the group...

• Replies: 2
• Views: 2,233
10-24-2012, 08:04 AM
55. ### Approximate Bayesian Computation and joint posteriors

Hi! I am performing Approximate Bayesian Computation (ABC) in phylogenetic research. I have a few questions for which I am looking for a useful...

• Replies: 0
• Views: 1,228
01-08-2012, 10:30 PM
56. ### AR(1) Model: Are the results the same?

Suppose we have 23 observations, with time t=1,2,...,23. The dataset has 3 variable, t (time), x (independent) and y (dependent). The dependent ...

• Replies: 0
• Views: 2,492
07-27-2014, 01:32 PM
57. ### Are my observations independent or not?

Hi everyone! I have an issue with my observations. I don't know if I can state they are independent or not. In my study, I have 8 different tasks...

• Replies: 4
• Views: 3,325
07-18-2013, 02:33 PM
58. ### Are nodes connecting each other random?

Given a network composed of ten nodes and 20 symmetric ties, how to calculate the probability of displaying one or more cliques (nodes connecting...

• Replies: 0
• Views: 1,436
08-31-2012, 11:16 PM

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