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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: 18,786
    10-11-2014, 12:02 PM Go to last post
  1. HI what does the alpha sign mean?

    it says, such and such variable (6 items, "alpha sign" = .88) is a measure of .......

    Started by h974483‎, 10-06-2011 01:48 AM
    • Replies: 0
    • Views: 1,959
    10-06-2011, 01:48 AM Go to last post
  2. ploting a graph in excel

    Hi I am reading an article about plotting graphs on excel: core.ecu.edu/psyc/wuenschk/stathelp/Excel-ErrorBars.doc In the document it says: ...

    Started by h974483‎, 10-07-2011 06:21 AM
    • Replies: 1
    • Views: 1,804
    10-07-2011, 09:09 AM Go to last post
  3. Do you know how you can solve this

    I want to plot a graph of the mean of two groups in the experiment. They have different mean, different standard deviation. The interval bars that...

    Started by h974483‎, 10-07-2011 05:22 PM
    • Replies: 0
    • Views: 1,810
    10-07-2011, 05:22 PM Go to last post
  4. 95% ci

    Hi I am trying to interpret a journal article about the results of whether drinking cokes leads to child hyperactivity, the sample taken from a...

    Started by h974483‎, 10-22-2011 05:37 AM
    • Replies: 2
    • Views: 2,443
    10-24-2011, 08:25 AM Go to last post
  5. 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...

    Started by Hack‎, 10-22-2013 01:59 PM
    • Replies: 1
    • Views: 2,269
    10-01-2015, 08:23 AM Go to last post
  6. Unbalanced samples

    Hi! I want to compare between two sample, but they have non equivalent means between demographic parameters such as age and more. What do you...

    Started by Hadar‎, 07-18-2016 06:21 AM
    • Replies: 1
    • Views: 1,375
    07-18-2016, 08:12 AM Go to last post
  7. Unhappy How i can analyse two questionnaires to find the Reliability Coefficient

    I am working on a project in which i am comparing Public and Private schools performance for that I have to compare the data on SPSS to find the...

    Started by hafsa‎, 06-26-2016 04:35 PM
    spss
    • Replies: 0
    • Views: 1,733
    06-26-2016, 04:35 PM Go to last post
  8. Data analysis

    Hi, please can someone help me out. I would like to know if I have performed the correct analysis for my study. I am comparing direct response...

    Started by Hafsah‎, 11-21-2016 01:51 PM
    • Replies: 0
    • Views: 3,343
    11-21-2016, 01:51 PM Go to last post
  9. which statistical test to use in spss

    I have a variable (dependent) and five independent variables. How can I test if the five variables affect the dependent variable? Which test should...

    Started by hahahihihuhu‎, 03-02-2011 12:38 PM
    • Replies: 1
    • Views: 5,856
    03-03-2011, 08:56 PM Go to last post
  10. Post How to test data if it is normal distribution in spss ?

    Hello Good morning guys i will need some help truly i have variables in spss most of them scale type, some of them are nominal, and few are...

    Started by hanialbarni‎, 11-12-2014 11:29 PM
    distribution, graph, normal, problem formulation, spss
    • Replies: 6
    • Views: 3,155
    11-18-2014, 03:01 AM Go to last post
  11. Post What should i do after factor analysis output ?

    Hello, I am having a construct name trust that includes the following constructs: 1 - Benevolence ( 3 Items) 2 - Integrity ( 6 Items ) 3 -...

    Started by hanialbarni‎, 11-19-2014 10:11 AM
    • Replies: 3
    • Views: 3,244
    11-20-2014, 09:10 PM Go to last post
  12. Post Best factor analysis settings in SPSS ?

    Hello Where i can get the best setting for factor analysis in spss for descriptives, extractions, rotations, scores, and options. I dont mind...

    Started by hanialbarni‎, 11-24-2014 06:31 AM
    • Replies: 1
    • Views: 1,989
    11-24-2014, 11:17 AM Go to last post
  13. Post Which analysis i should use to test/support hypothsis ?

    Hello Can someone tell me which type of analysis I should use to test hypothesis ? Which analysis best show me measure between 2 constructs ?

    Started by hanialbarni‎, 12-01-2014 08:14 AM
    • Replies: 5
    • Views: 1,835
    12-01-2014, 11:49 PM Go to last post
  14. Lightbulb Accept Null hypothesis VS Reject Null hypothesis ?

    Hello Good evening everyone, I read about this for testing my hypothesis but still confusing me this accept/reject null hypothesis can...

    Started by hanialbarni‎, 12-02-2014 03:13 PM
    • Replies: 5
    • Views: 4,086
    12-03-2014, 05:38 AM Go to last post
  15. Post How to transform non-normal variable to normal distrubtion ?

    Hello Good morning, Can you please give me a way to transform non-normal variable in SPSS to normal distributions? We try LG10(DATA) as...

    Started by hanialbarni‎, 12-05-2014 07:36 AM
    • Replies: 5
    • Views: 2,290
    12-06-2014, 11:01 AM Go to last post
  16. Question How can i check from this table if data normally distrubtion or not ?

    Hello How can I check from this output if data normally distribution or not ?

    Started by hanialbarni‎, 12-13-2014 02:04 AM
    • Replies: 1
    • Views: 1,757
    12-15-2014, 07:56 AM Go to last post
  17. How to alculate cross loadings of each item in SPSS ?

    Hello Can someone give me the way to do it in SPSS

    Started by hanialbarni‎, 12-20-2014 12:04 AM
    • Replies: 0
    • Views: 1,521
    12-20-2014, 12:04 AM Go to last post
  18. Question Calculate Sample size using calculator ?

    Hello Can some one give me formula to calculate sample size using calculator or manually. This data I have right now: Population size = 500...

    Started by hanialbarni‎, 12-25-2014 07:01 PM
    • Replies: 4
    • Views: 2,106
    01-11-2015, 12:00 PM Go to last post
  19. Poll Poll: weight construction in DEA analysis

    Hi, I hava a problem with weight construction in Data envelopment analysis. My goal is to construct weights that reflects the reality of my data....

    Started by hanke83‎, 05-08-2013 04:46 AM
    data envelopment analysis, dea, weight construction, weights
    • Replies: 0
    • Views: 976
    05-08-2013, 04:46 AM Go to last post
  20. 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!! :)...

    Started by Hanni_Berlin‎, 08-20-2015 07:22 AM
    • Replies: 0
    • Views: 1,426
    08-20-2015, 07:22 AM Go to last post
  21. Effect size measures comparability

    Hi everyone, I registered just now, because I have been struggling with a question I have not been able to answer (and one of my fellow graduate...

    Started by hanzifranz‎, 04-13-2013 02:13 PM
    • Replies: 0
    • Views: 1,780
    04-13-2013, 02:13 PM Go to last post
  22. Poll Poll: do my model considered fit in AMOS?

    Dear all members, I m hereby new members and currently conducting research on organization behavior areas. I need help from all of you. I am very...

    Started by harianto‎, 02-28-2011 02:13 AM
    • Replies: 3
    • Views: 13,362
    08-20-2011, 01:22 AM Go to last post
  23. 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...

    Started by Haribo‎, 02-27-2013 06:26 AM
    • Replies: 1
    • Views: 1,155
    02-27-2013, 10:55 AM Go to last post
  24. [ask] estimate the word "precision" from statistical book by using cluster sampling

    hi everyone, i have been a task about how to estimate the word "precision" from statistical book by using cluster sampling. plz help me, i've been...

    Started by harris‎, 04-21-2013 11:50 PM
    • Replies: 3
    • Views: 1,679
    04-23-2013, 07:03 AM Go to last post
  25. Help with confirming what I can and cannot conclude from this regression output

    This study tried to determine the factors influencing the probability that voters would be asked to show ID in order to vote in a certain state...

    Started by Harry717‎, 02-18-2017 12:14 PM
    • Replies: 1
    • Views: 1,483
    02-19-2017, 04:55 PM Go to last post
  26. help with finding corelation of 2 variable data

    Hi all This is my first post May be this is a dumb question but I need quick help please I have data for 95 people Outcome scored by doctors...

    Started by Harrybaba‎, 04-17-2015 12:46 PM
    • Replies: 0
    • Views: 2,003
    04-17-2015, 12:46 PM Go to last post
  27. Significant Difference with 2 vars

    Hi everyone, Is it at all possible to determine if a group of points on a scatterplot are significantly different from another group of points? ...

    Started by harryema‎, 06-24-2010 07:04 PM
    • Replies: 7
    • Views: 3,792
    06-25-2010, 11:03 AM Go to last post
  28. need help in determining appropriate sample size

    Hi: I need help in calculating Sample size for my study. I am aiming to collect survey response for leadership study from different firms located...

    Started by Hassan‎, 05-01-2011 12:56 AM
    • Replies: 0
    • Views: 1,789
    05-01-2011, 12:56 AM Go to last post
  29. Unhappy No idea how to perform my statistical analysis...

    Hello everybody! I'm new here... I'm really need help with this issue... Now I am so lost that I do have no idea how to do the stats for one of my...

    Started by hauptner‎, 08-30-2012 01:22 PM
    • Replies: 7
    • Views: 2,610
    09-18-2012, 09:55 AM Go to last post
  30. Gaussian Processes - Wiener process - The drunk particle

    Hello, I recently read about Gaussian Processes (http://en.wikipedia.org/wiki/Gaussian_process) for non linear regression. I am not an expert but...

    Started by havyhidalgo‎, 03-04-2013 12:21 PM
    gaussian distribution, gaussian processes, regression model, wiener process
    • Replies: 0
    • Views: 2,262
    03-04-2013, 12:21 PM Go to last post
  31. ITIL Remedy Help Desk Incident Data - Statistical Analysis for research

    Hello, My first thread on the board. It is my hope that I am posting this to the right thread I was wondering if you could help me with a...

    Started by hayaag‎, 07-14-2017 05:19 PM
    • Replies: 11
    • Views: 697
    07-20-2017, 09:46 AM Go to last post
  32. Optimal combination of conditions

    I am looking to find an efficient process to determine the set of conditions that results in the optimal likelihood of accomplishing some task. ...

    Started by haz33‎, 02-03-2011 04:30 PM
    • Replies: 12
    • Views: 4,411
    02-06-2011, 02:55 PM Go to last post
  33. does the following interaction make sense?

    Hello, I have a problem, it would be great if someone could help me with it. I m analyzing a sample of patients with eating disorders (anorexia ,...

    Started by hazel‎, 06-21-2012 01:12 AM
    • Replies: 0
    • Views: 1,364
    06-21-2012, 01:12 AM Go to last post
  34. dummy*continous interaction- sig. main effect, non-significant interaction

    Hi all, I would be grateful if someone could give me advice on the following topic: I estimated a glm and formed an interaction term out of a...

    Started by hazel‎, 06-28-2012 05:33 PM
    • Replies: 0
    • Views: 1,856
    06-28-2012, 05:33 PM Go to last post
  35. Angry Simple or Factorial Experiment Could I Chose?

    Dear, friends, scientests, and researchers I conducted an experiment to study two factors, first was irrigation method (I) which consisted 2...

    Started by hazemalashwal‎, 12-28-2015 08:55 AM
    • Replies: 1
    • Views: 1,279
    12-28-2015, 09:00 AM Go to last post
  36. Why does anyone bother to post questions here?

    A very large number have no answers. What's the point?

    Started by hcc‎, 06-02-2015 11:52 PM
    2 Pages
    1 2
    • Replies: 27
    • Views: 4,231
    06-05-2015, 05:18 AM Go to last post
  37. Can I use Partial Eta Squared for t-tests?

    Hi, I am currently trying to decide which effect size is the most appropriate for my results. I have conducted a repeated measures ANOVA, there...

    Started by heather88‎, 05-22-2015 05:47 AM
    effect size., partial eta squared, t-tests
    • Replies: 0
    • Views: 1,157
    05-22-2015, 05:47 AM Go to last post
  38. Don't know where to start, please help

    :eek: Please any kind person help, as I am horribly stuck!!! I have a *very* large dataset (n>300,000 rows) of water readings in this format; ...

    Started by heather_s‎, 03-23-2010 12:30 AM
    • Replies: 2
    • Views: 2,234
    03-23-2010, 10:43 PM Go to last post
  39. Determining Sample Size for Quality Audit

    I hope I am posting this to the right section, I really have no idea about statistics. I work for a healthcare company working in residential...

    Started by heathstats‎, 07-11-2014 03:01 AM
    • Replies: 0
    • Views: 2,019
    07-11-2014, 03:01 AM Go to last post
  40. Relevance of covariates?

    I have a big group A of individuals that have one common characteristic that make them part of a study in which certain binary variable has to be...

    Started by hebertodelrio‎, 10-07-2017 09:47 AM
    • Replies: 2
    • Views: 237
    10-11-2017, 10:37 AM Go to last post
  41. Calculating and interpreting Spearman's Rank Correlation...

    Hi. I am completing an undergraduate research project and am having a bit of trouble completing the statistical analysis. I'll briefly run through...

    Started by Hedgehog‎, 11-24-2010 01:33 AM
    • Replies: 1
    • Views: 5,863
    12-04-2010, 04:15 AM Go to last post
  42. Zero vs missing data

    Hello I have a question regarding 0 (=zero) vs missing data. If I have an observation that have many variables but one of the variable is not...

    Started by Hedva‎, 08-28-2016 08:02 AM
    • Replies: 3
    • Views: 1,045
    08-29-2016, 03:12 AM Go to last post
  43. how to calculate the propagated error

    Hello, I have difficulties in calcuating the propagated error of my variable x and was hoping that someone knows. My variable x is calculated...

    Started by Hedwig‎, 06-26-2013 08:09 AM
    • Replies: 0
    • Views: 493
    06-26-2013, 08:09 AM Go to last post
  44. Choosing a model for categorical data

    Hi all, I'm not very familiar with working with categorical data. I would like to model a categorical response variable (nominal, three levels) as a...

    Started by Heidi Swanson‎, 03-09-2010 05:20 PM
    • Replies: 2
    • Views: 2,653
    03-17-2010, 03:59 PM Go to last post
  45. Beta error

    Hey guys I really need help from you to calculate the beta error of two different samples. The values are: Average rate of the first sample:...

    Started by Heisenberg‎, 12-09-2013 09:08 AM
    • Replies: 0
    • Views: 694
    12-09-2013, 09:08 AM Go to last post
  46. Using chi-squared test for goodness of fit for different sizes of sample?

    Firstly, apologies if I'm posting this in completely the wrong place. I'm trying to figure out a way to allow for different sized samples when...

    Started by HelenW‎, 10-28-2011 02:26 PM
    chi-square, chi-squared
    • Replies: 1
    • Views: 3,857
    10-28-2011, 03:34 PM Go to last post
  47. Exclamation God you people are clever!

    Hi, :wave: I'm collecting data from a single group of 15 participants showing their improvement in a 5 stage levelled test before and after an...

    Started by help me!‎, 01-05-2010 02:30 PM
    • Replies: 5
    • Views: 5,063
    05-08-2010, 12:52 AM Go to last post
  48. Question To combine or not to combine standard deviations?

    Hi, I'm testing the effect of 115 Chinese herbs on bacterial biofilms. I have been carrying out my experiment in microtiter plates and...

    Started by Hemmi‎, 10-11-2012 01:23 AM
    means, standard deviation
    • Replies: 3
    • Views: 2,009
    10-14-2012, 12:15 AM Go to last post
  49. Complementary log log

    Hi I have a model with a binomial error distribution. Instead of the logit link I use the complementary log log. What is the interpretation of...

    Started by hen666‎, 02-12-2009 01:24 PM
    • Replies: 1
    • Views: 4,780
    02-12-2009, 04:09 PM Go to last post
  50. What Analysis tools should I use in SPSS?

    I am trying to work through some research issues and NOT a stats major. I have all the data and using SPSS. My research question is to determine...

    Started by henni8a5‎, 12-06-2014 07:53 PM
    • Replies: 1
    • Views: 1,958
    12-08-2014, 03:04 AM Go to last post
  51. What method to use for my research

    Hello all, thank you for taking the time to read this! I have the following statistics problem. I am have a small number of documents from...

    Started by henryvth‎, 04-17-2013 03:50 AM
    • Replies: 0
    • Views: 537
    04-17-2013, 03:50 AM Go to last post
  52. Parametric t-tests for individual / portfolio stock returns

    Hello everyone, I am relatively rookie with statistical tests and I am trying to perform a parametric t-test for stock returns as follows. I have...

    Started by hensor89‎, 12-20-2016 05:48 PM
    • Replies: 2
    • Views: 3,433
    12-21-2016, 10:22 AM Go to last post
  53. Likert scale analysis

    Hi all! I want to ask that i have likert scale questionnaire with 6 points scale. If i am going to analyze using as interval data, that means i have...

    Started by hepymoon‎, 02-15-2011 08:13 AM
    • Replies: 0
    • Views: 3,966
    02-15-2011, 08:13 AM Go to last post
  54. 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: 724
    01-26-2014, 02:05 PM Go to last post
  55. Question Problems with some financial time-series

    Hello, For my thesis I was given the assignment to research the effect of macroeconomic news on stocks. I chose to investigate the effect of US...

    Started by HETISFRANK‎, 12-02-2013 06:47 PM
    • Replies: 0
    • Views: 1,192
    12-02-2013, 06:47 PM Go to last post
  56. Question question about null hypothesis??

    here is my question: in my minor thesis, based on my theoretical framework, i have a hypothesis that stated that: "the score of group A is the same...

    Started by heymandy‎, 01-25-2012 11:54 PM
    hypothesis
    • Replies: 7
    • Views: 3,009
    01-27-2012, 04:37 AM Go to last post
  57. Question Help with thesis research on social bookmarking

    Hi, I'm writing my thesis right now and I must admit that I underestimated the complexity of the required statistics a bit. My description is quite...

    Started by HFFL‎, 09-01-2008 12:21 PM
    • Replies: 1
    • Views: 2,690
    11-07-2008, 09:54 PM Go to last post
  58. Jackknife

    I tried to find a specific example of an application of the 'jackknife' command on google, but didn't find any so far. Someone has one? For...

    Started by hfwd‎, 02-28-2009 10:14 AM
    • Replies: 2
    • Views: 4,726
    03-15-2009, 10:11 AM Go to last post
  59. Fuzzy RDD in Stata with two cutoff points

    Dear all, i am running a Fuzzy Regression Discontinuity Design using 2SLS in Stata. My question is basically if i specified the model (and most...

    Started by HG28‎, 08-20-2017 03:02 PM
    • Replies: 0
    • Views: 317
    08-20-2017, 03:02 PM Go to last post
  60. HLM or MANOVA/MANCOVA

    Hello, For my study, I will use a data set that includes 22 schools, 2 to 20 teachers in each school, and 4 students from each teachers'...

    Started by HHH‎, 11-11-2014 10:27 AM
    • Replies: 0
    • Views: 3,081
    11-11-2014, 10:27 AM Go to last post

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