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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: 18,645
    10-11-2014, 12:02 PM Go to last post
  1. Question 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...

    Started by tyrankj‎, 09-02-2008 12:20 AM
    • Replies: 2
    • Views: 4,767
    09-02-2008, 03:38 AM Go to last post
  2. Anova & post hoc analysis

    wrong forum

    Started by ebott‎, 11-15-2013 09:39 PM
    • Replies: 0
    • Views: 1,470
    11-15-2013, 09:39 PM Go to last post
  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...

    Started by KatkaK‎, 10-24-2015 05:32 PM
    • Replies: 3
    • Views: 1,642
    10-28-2015, 02:38 AM Go to last post
  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...

    Started by will22‎, 01-21-2013 06:38 PM
    • Replies: 7
    • Views: 4,758
    01-21-2013, 11:33 PM Go to last post
  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...

    Started by dochamer‎, 08-16-2014 05:21 PM
    • Replies: 0
    • Views: 1,100
    08-16-2014, 05:21 PM Go to last post
  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...

    Started by rbalo‎, 01-29-2010 02:35 PM
    • Replies: 1
    • Views: 9,681
    01-29-2010, 10:30 PM Go to last post
  7. Question 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...

    Started by penn whitley‎, 12-01-2011 06:06 PM
    anova, blocking, model, split-plot
    • Replies: 1
    • Views: 1,392
    12-02-2011, 02:33 AM Go to last post
  8. ANOVA Explanation

    Hey Guys, am not a statistician but came across a publication when researching on cloud computing but have not been able to understand the...

    Started by Future‎, 01-04-2014 09:48 AM
    • Replies: 1
    • Views: 1,120
    01-13-2014, 09:45 AM Go to last post
  9. 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...

    Started by EmmaWP‎, 02-13-2013 05:11 PM
    • Replies: 5
    • Views: 1,115
    02-13-2013, 05:32 PM Go to last post
  10. 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...

    Started by mwill101‎, 11-07-2011 01:07 PM
    2 Pages
    1 2
    • Replies: 20
    • Views: 4,296
    11-07-2011, 10:09 PM Go to last post
  11. 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...

    Started by Petes‎, 12-11-2012 04:25 AM
    • Replies: 1
    • Views: 3,275
    02-08-2015, 09:48 AM Go to last post
  12. 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,...

    Started by dalsauks‎, 02-01-2011 12:39 AM
    • Replies: 0
    • Views: 3,714
    02-01-2011, 12:39 AM Go to last post
  13. 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...

    Started by marvinb‎, 04-14-2010 02:29 PM
    • Replies: 0
    • Views: 2,859
    04-14-2010, 02:29 PM Go to last post
  14. 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...

    Started by Andy26‎, 10-18-2015 02:25 PM
    • Replies: 4
    • Views: 1,651
    10-22-2015, 06:35 AM Go to last post

    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...

    Started by Anna12‎, 04-21-2014 12:13 PM
    anova, manova
    • Replies: 1
    • Views: 1,861
    05-07-2014, 05:41 AM Go to last post
  16. Question 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...

    Started by looli12‎, 07-20-2013 09:28 PM
    anova, categorical, regression, spss
    • Replies: 0
    • Views: 1,277
    07-20-2013, 09:28 PM Go to last post
  17. 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%....

    Started by Mukund‎, 03-16-2016 05:13 AM
    anova, t-test
    • Replies: 0
    • Views: 1,375
    03-16-2016, 05:13 AM Go to last post
  18. 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: 1,690
    03-01-2017, 12:20 PM Go to last post
  19. 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,...

    Started by shanehall.m‎, 11-04-2011 10:14 AM
    anova, average, categorical vairable
    • Replies: 4
    • Views: 2,193
    11-07-2011, 09:34 AM Go to last post
  20. 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...

    Started by rob c‎, 05-10-2009 07:00 PM
    • Replies: 2
    • Views: 3,986
    05-10-2009, 09:12 PM Go to last post
  21. 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...

    Started by joefoy‎, 08-15-2017 02:41 PM
    kruskal-wallis anova
    • Replies: 1
    • Views: 199
    08-16-2017, 04:14 AM Go to last post
  22. 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)......

    Started by med1234‎, 06-13-2011 02:16 PM
    • Replies: 7
    • Views: 18,210
    06-14-2011, 12:14 AM Go to last post
  23. 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,...

    Started by piblet‎, 06-05-2009 08:37 AM
    • Replies: 3
    • Views: 5,749
    06-05-2009, 12:15 PM Go to last post
  24. 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: 1,982
    03-03-2017, 01:37 AM Go to last post
  25. 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...

    Started by RMann‎, 01-11-2015 07:37 AM
    • Replies: 0
    • Views: 901
    01-11-2015, 07:37 AM Go to last post
  26. 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...

    Started by Lönneberga‎, 08-05-2014 07:32 AM
    • Replies: 0
    • Views: 1,137
    08-05-2014, 07:32 AM Go to last post
  27. 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,...

    Started by EnzoTaglia‎, 03-13-2012 05:10 PM
    • Replies: 6
    • Views: 2,542
    03-27-2012, 04:01 PM Go to last post
  28. 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...

    Started by elad83‎, 10-31-2016 01:55 PM
    anova, anova intercept
    • Replies: 3
    • Views: 3,517
    10-31-2016, 03:02 PM Go to last post
  29. 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...

    Started by jalanthomas‎, 01-08-2007 09:17 PM
    • Replies: 0
    • Views: 2,280
    01-08-2007, 09:17 PM Go to last post
  30. 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...

    Started by DaH‎, 10-02-2013 07:57 AM
    • Replies: 0
    • Views: 1,500
    10-02-2013, 07:57 AM Go to last post
  31. Thumbs up 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...

    Started by nelson85‎, 10-09-2012 06:25 AM
    anova, normality test, residuals
    • Replies: 0
    • Views: 1,805
    10-09-2012, 06:25 AM Go to last post
  32. 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...

    Started by RaulS1987‎, 12-10-2013 10:30 AM
    • Replies: 4
    • Views: 1,463
    12-16-2013, 11:21 AM Go to last post
  33. 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: 1,060
    03-10-2017, 06:38 PM Go to last post
  34. 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...

    Started by John.Thomas‎, 03-06-2014 08:03 AM
    • Replies: 0
    • Views: 904
    03-06-2014, 08:03 AM Go to last post
  35. 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...

    Started by Gards79‎, 06-06-2014 12:11 PM
    • Replies: 6
    • Views: 1,585
    06-06-2014, 06:13 PM Go to last post
  36. 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...

    Started by tsukiko‎, 05-04-2011 09:05 AM
    • Replies: 0
    • Views: 2,079
    05-04-2011, 09:05 AM Go to last post
  37. 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...

    Started by chaoninja‎, 03-05-2011 07:18 PM
    • Replies: 7
    • Views: 3,344
    03-07-2011, 02:59 AM Go to last post
  38. 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...

    Started by treebeard‎, 09-22-2013 02:41 PM
    calculus of probability, literature, literature research, markoff, old stats
    • Replies: 0
    • Views: 762
    09-22-2013, 02:41 PM Go to last post
  39. 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...

    Started by arborkoeser‎, 11-02-2011 12:59 AM
    • Replies: 0
    • Views: 2,210
    11-02-2011, 12:59 AM Go to last post
  40. 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,...

    Started by Nivv‎, 12-12-2015 08:21 AM
    • Replies: 0
    • Views: 1,047
    12-12-2015, 08:21 AM Go to last post
  41. 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...

    Started by Lazar‎, 09-16-2014 06:26 PM
    api, gis
    • Replies: 0
    • Views: 2,400
    09-16-2014, 06:26 PM Go to last post
  42. 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...

    Started by trulu‎, 10-05-2016 05:26 AM
    • Replies: 1
    • Views: 2,718
    10-25-2016, 08:18 AM Go to last post
  43. 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 ...

    Started by bsaikrishna‎, 12-06-2010 02:47 AM
    • Replies: 6
    • Views: 5,661
    12-08-2010, 12:54 AM Go to last post
  44. 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...

    Started by MirAli‎, 04-04-2013 02:10 AM
    • Replies: 1
    • Views: 926
    04-04-2013, 05:04 AM Go to last post
  45. 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...

    Started by vjyofudp‎, 08-31-2015 10:11 AM
    • Replies: 1
    • Views: 1,434
    08-31-2015, 01:21 PM Go to last post
  46. 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...

    Started by hermes014‎, 01-26-2014 02:05 PM
    • Replies: 0
    • Views: 718
    01-26-2014, 02:05 PM Go to last post
  47. Red face 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: ...

    Started by hrj21‎, 06-06-2012 07:08 AM
    • Replies: 3
    • Views: 1,639
    06-21-2012, 03:51 AM Go to last post
  48. Smile 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...

    Started by icsd04‎, 07-22-2011 09:33 AM
    2 Pages
    1 2
    • Replies: 16
    • Views: 5,991
    07-26-2011, 10:11 PM Go to last post
  49. 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...

    Started by Sta‎, 07-24-2011 12:33 AM
    • Replies: 2
    • Views: 2,221
    07-30-2011, 03:22 AM Go to last post
  50. 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...

    Started by ahhk22‎, 08-15-2016 10:35 PM
    sample size determination
    • Replies: 2
    • Views: 871
    08-16-2016, 08:22 PM Go to last post
  51. 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...

    Started by arkcomputers‎, 03-03-2009 01:47 PM
    • Replies: 4
    • Views: 4,005
    03-04-2009, 12:39 AM Go to last post
  52. 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...

    Started by spss_n00b‎, 04-07-2014 10:05 AM
    • Replies: 4
    • Views: 1,773
    04-08-2014, 02:51 PM Go to last post
  53. appropriate test for comparing rank order of countries

    I have a dataset where countries are ranked based on how often they are chosen by firms in different time periods i.e. 1966-80, 1981-95, 1996-2010. I...

    Started by tstats‎, 01-01-2011 08:22 PM
    • Replies: 2
    • Views: 5,538
    01-02-2011, 05:57 AM Go to last post
  54. 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...

    Started by Mikkey‎, 05-19-2016 07:55 PM
    content analysis, dependent, independent, methodology, t-test
    • Replies: 4
    • Views: 1,348
    05-22-2016, 07:15 AM Go to last post
  55. 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...

    Started by mbwaterdog‎, 01-14-2015 05:20 PM
    • Replies: 1
    • Views: 1,281
    01-14-2015, 06:48 PM Go to last post
  56. 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...

    Started by jesse‎, 10-24-2012 07:14 AM
    dummy variable, logistic regression
    • Replies: 2
    • Views: 2,233
    10-24-2012, 08:04 AM Go to last post
  57. 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...

    Started by Stingery‎, 01-08-2012 10:30 PM
    abc, bayes, joint distribution, posterior
    • Replies: 0
    • Views: 1,228
    01-08-2012, 10:30 PM Go to last post
  58. 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 ...

    Started by swing‎, 07-27-2014 01:32 PM
    • Replies: 0
    • Views: 2,492
    07-27-2014, 01:32 PM Go to last post
  59. Question 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...

    Started by supertoket‎, 07-16-2013 03:59 PM
    independent observations, t-test
    • Replies: 4
    • Views: 3,325
    07-18-2013, 02:33 PM Go to last post
  60. 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...

    Started by watashi‎, 08-31-2012 11:16 PM
    • Replies: 0
    • Views: 1,436
    08-31-2012, 11:16 PM Go to last post

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