1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
    05-10-2017
    Views:
    1,875
+ Post New Thread
Page 4 of 54 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 ... LastLast
Threads 181 to 240 of 3193

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: 18,731
    10-11-2014, 12:02 PM Go to last post
  1. One Sample T-Test with Likert Scale Questionnaire

    Hi all, I am doing a research and will study the how user think about shopping online. In my questionnaire, I have 3 questions - using Likert...

    Started by kenzq‎, 04-17-2009 03:08 AM
    • Replies: 8
    • Views: 66,500
    12-17-2016, 02:18 AM Go to last post
  2. Factor Analysis vs. Principal Component Analysis

    I've asked this question on here a while back but didn't quite get an answer that helped me understand what is truly different about these two...

    Started by lancearmstrong1313‎, 01-02-2013 01:50 PM
    • Replies: 8
    • Views: 4,158
    01-09-2013, 07:31 PM Go to last post
  3. Need urget help for one sample z test of proportions

    Hi All, I need to confirm whether I am doing it correctly. Survey question is: Have you ever witnessed violent episodes/incidents in the...

    Started by Markkkkk‎, 02-08-2013 01:49 AM
    one sample, proportion, statistical research, z test
    • Replies: 8
    • Views: 1,839
    02-14-2013, 05:42 AM Go to last post
  4. 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...

    Started by ghada8888‎, 04-12-2013 12:43 PM
    • Replies: 8
    • Views: 1,434
    04-12-2013, 03:12 PM Go to last post
  5. How to compare multiple testers wine ratings?

    Newbie alert! Problem description: I have 20 wines and 6 tasters. Each taster ranks the wines from 1 to 20. Question: How do I test the...

    Started by achalk‎, 06-24-2013 07:05 PM
    ranks
    • Replies: 8
    • Views: 1,481
    06-25-2013, 07:48 AM Go to last post
  6. Health center level data to client level data?? posible?

    I have data for 31 centers (observations) and have the following variables of interest. Ex: IDcenter= 1 client_black=25 client_white 50...

    Started by Marvin85‎, 07-30-2013 09:23 AM
    • Replies: 8
    • Views: 2,007
    08-08-2013, 01:13 PM Go to last post
  7. normal distribution

    I tried three transformations (LG10, SQRT, rank transformation). But I couldn't make the data normally distributed. Could you kindly let me know if...

    Started by eunkum‎, 09-04-2013 05:26 PM
    • Replies: 8
    • Views: 2,082
    09-04-2013, 06:54 PM Go to last post
  8. Unable to determine the right test?

    hello, I'm doing a paper on measuring authors productivity and unable to decide what should I use as my statistical test to come up with solid...

    Started by iha2005‎, 10-10-2013 04:23 PM
    • Replies: 8
    • Views: 2,393
    10-20-2013, 01:09 PM Go to last post
  9. adj. r-square

    I got a negative adj. r-square. Since the effect size (Adj R-sq=-.016) was low, did it indicate that a time in treatment (the independent variable)...

    Started by eunkum1‎, 05-02-2014 01:20 PM
    • Replies: 8
    • Views: 3,159
    05-02-2014, 05:10 PM Go to last post
  10. Need help with Multiple Imputations ("pooled" dataset)

    Hello everybody, My original data set (n=901) contains missing values (10-20% per variable). I am applying Multiple Imputations technique using...

    Started by kiton‎, 06-20-2014 11:39 AM
    • Replies: 8
    • Views: 3,935
    06-23-2014, 02:07 PM Go to last post
  11. Question Are they misunderstanding ANOVAs here?

    Hi, Here's an extract from a paper I'm using in a systematic review: The mean GAD-7 score of the sample prior to the course was 10.98 (SD 5.17,...

    Started by fishfishfish3‎, 10-23-2014 11:56 AM
    anova, post hoc
    • Replies: 8
    • Views: 2,466
    10-24-2014, 11:22 AM Go to last post
  12. Looking to hire freelance statistician

    I'm sorry if this isn't the right thread to post this question, but here goes. I'm looking for a statistician to do some freelance work, but I'm...

    Started by jonmrich‎, 11-13-2014 11:05 AM
    freelance
    • Replies: 8
    • Views: 2,258
    11-13-2014, 01:07 PM Go to last post
  13. mean+standard deviation+skewness+kurtosis

    hi I want to order some variables according to (mean+standard deviation+skewness+kurtosis) or some new rule considering mean value, standard...

    Started by WEIBO‎, 03-06-2015 05:51 AM
    kurtosis, skewness
    • Replies: 8
    • Views: 2,480
    03-06-2015, 02:25 PM Go to last post
  14. 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...

    Started by Jane M‎, 07-09-2015 10:14 AM
    • Replies: 8
    • Views: 1,600
    07-09-2015, 12:24 PM Go to last post
  15. Suggestions PLEASE.

    I work for a company that sells products online. I am attempting to create a common sense SOP for our email marketing campaigns and have plenty...

    Started by m_edmonson‎, 10-21-2015 02:47 PM
    • Replies: 8
    • Views: 1,914
    10-22-2015, 05:22 PM Go to last post
  16. Costant coefficient in logit model

    Hello, I would like to make sure of my argument. Am I right when I say that a constant coefficient in logit model MUST BE close to zero ?? ...

    Started by russel2000‎, 11-21-2015 09:33 AM
    • Replies: 8
    • Views: 1,503
    11-23-2015, 11:51 AM Go to last post
  17. Measuring effect - urgent

    Hi Guys, For my thesis, I am researching the influence of colour (IV) on product attractiveness (DV). Respondents in my experiment choose one of 7...

    Started by Jeroennn‎, 08-01-2016 04:38 AM
    • Replies: 8
    • Views: 1,850
    08-01-2016, 01:05 PM Go to last post
  18. Best Stat Question Ever?

    Got this off Twitter (@galka_max) and found it interesting: If you choose an answer to this question at random, what is the chance you will get it...

    Started by The Game‎, 06-20-2017 09:42 PM
    • Replies: 8
    • Views: 882
    09-06-2017, 01:14 AM Go to last post
  19. Is survey design statistically correct?

    I want to track improvements in how yoga class participants feel on various variables (e.g. energy level, sleep quality, pain felt, mental...

    Started by johnsif‎, 03-30-2017 02:47 AM
    • Replies: 8
    • Views: 1,392
    04-02-2017, 10:33 AM Go to last post
  20. Joint Normal CDF

    Hello I am new to this forum as well as to actuary field. I have this question: There are two random variables X_1 and X_2 following standard...

    Started by hpriye‎, 06-19-2008 05:10 AM
    • Replies: 7
    • Views: 7,545
    06-20-2008, 08:13 AM Go to last post
  21. markov chain modelling

    Hi guys, Got a complex question regarding markov chain modelling. I'll start off with an example. Say you own a credit card and you can only...

    Started by ace123‎, 08-22-2008 04:51 PM
    • Replies: 7
    • Views: 4,480
    08-23-2008, 09:12 PM Go to last post
  22. Expected Value of a Sample Range

    The function for the expected value of a sample range is given on the following page. http://www.jmu.edu/docs/sasdoc/sashtml/qc/chapc/sect9.htm ...

    Started by Papabravo‎, 10-15-2008 12:27 PM
    • Replies: 7
    • Views: 17,497
    10-16-2008, 07:34 PM Go to last post
  23. (non-)parametric test dilemma

    I want to compare means of 6 variables and to do correlation analysis. I did Kolmogorov-Smirnov test and it showed that 3 of them are normally...

    Started by rmil‎, 06-17-2009 10:45 AM
    • Replies: 7
    • Views: 7,213
    06-22-2009, 07:50 PM Go to last post
  24. residuals against Y

    Hi all- I'm looking for an argument / example in simple linear regression, if you plot the residuals against Y, there appears to be a relationship...

    Started by B_Miner‎, 09-29-2009 03:06 PM
    • Replies: 7
    • Views: 7,529
    09-30-2009, 11:23 AM Go to last post
  25. Question: making a positive case for "no effect"

    I have the results of a basic web-based marketing test. Visitors were randomly sent to one of several pages with a binary outcome of "sale" or "no...

    Started by dwilson‎, 10-21-2009 05:10 PM
    • Replies: 7
    • Views: 3,933
    10-26-2009, 03:23 PM Go to last post
  26. Comparing two distributions using random drawing.

    Hi all, So this is going to be a bit of a silly question: but one i've been pondering for ages. So say i've used a t-test and found two groups...

    Started by ThomasAG‎, 03-07-2010 03:59 PM
    • Replies: 7
    • Views: 3,930
    09-18-2011, 08:11 AM Go to last post
  27. how to find the UMVUE of the location parameter under t distribution

    f(x;\theta)={{\Gamma({{v+1}\over2})}\over{\Gamma({v\over2})\sqrt{\pi v}}}\Big(1+\frac{(x-\theta)^2}{v}\Big)^{-\frac{v+1}{2}} , v>=3 i have no...

    Started by egpivo‎, 04-03-2010 01:10 AM
    • Replies: 7
    • Views: 5,980
    04-04-2010, 09:05 AM Go to last post
  28. How to find out the specific association of a particular age bracket to a particular

    If I have a table (mXn) that contains the rows of age brackets (like 25-35 years, 35-45 years, 46-60 years) and three columns of low stress, medium...

    Started by Dr.Appalayya‎, 04-06-2010 03:54 AM
    • Replies: 7
    • Views: 3,651
    04-10-2010, 10:15 AM Go to last post
  29. rxc contingency table: comparison between cells?

    Hello.I'm a dental student. I'm studying about how restorative methods are going to affect fracture pattern(fra.(fp)) of teeth. As a result I have a...

    Started by batosan‎, 06-24-2010 06:58 AM
    • Replies: 7
    • Views: 5,729
    06-26-2010, 04:52 AM Go to last post
  30. 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: 3,783
    06-25-2010, 11:03 AM Go to last post
  31. paired T-test or anova

    Dear all just a quick simple one this time. if i had two sets of runners (in a race) for example and these two groups were linked only by the fact...

    Started by yoma819‎, 08-22-2010 05:51 PM
    • Replies: 7
    • Views: 5,598
    08-23-2010, 10:53 PM Go to last post
  32. Correlation Proof

    Hi guys, wondering if you could help me with a proof that I am trying to figure out. Here it is... Corr (A, B) = 0 and Corr (B, C) = 0. This...

    Started by statsq45‎, 09-25-2010 06:24 PM
    • Replies: 7
    • Views: 6,637
    10-07-2010, 03:34 PM Go to last post
  33. type of study?

    In a poll of 20,000 randomly selected college seniors, it was determined that 95% of them have a cell phone. What is the type of this...

    Started by SadieKhan‎, 10-21-2010 08:41 AM
    • Replies: 7
    • Views: 2,274
    10-21-2010, 12:57 PM Go to last post
  34. Uninformative gamma prior for Poisson distribution

    Hi! I want to use Poisson distribution in my research to model some waiting times and I want to set the gamma prior to its parameter. I want the...

    Started by karamnula‎, 01-16-2011 06:27 AM
    • Replies: 7
    • Views: 20,570
    01-17-2011, 03:16 AM Go to last post
  35. Please help me in identifying proper Stat Tool

    I asked for help few days back, but probably my question was not clear that time. I have asked e-gov experts to rank some issues related to e-gov...

    Started by dibakar‎, 01-19-2011 02:01 AM
    • Replies: 7
    • Views: 2,467
    01-19-2011, 05:19 AM Go to last post
  36. Question Normality analysis

    hye guys... i need a help.. Can someone show me how to run the normality analysis... In my questionnaires, I have 4 independent variables and...

    Started by ryan88‎, 01-26-2011 11:08 AM
    • Replies: 7
    • Views: 3,169
    02-09-2011, 06:58 PM 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: 3,365
    03-07-2011, 02:59 AM Go to last post
  38. Difference needed for power in fixed population.

    Hi, I am designing a study to examine the difference made by implementing a new treatment strategy for a medical condition. I have become a...

    Started by schisms‎, 03-23-2011 05:38 AM
    power, significance
    • Replies: 7
    • Views: 3,392
    03-25-2011, 12:34 PM Go to last post
  39. Calculating Effect Size

    Hi everyone I want to calculate the effect size for the national data with sample size more than ten thousand for the Independent Sample t-test and...

    Started by shafiqurrehman1‎, 05-17-2011 01:01 AM
    • Replies: 7
    • Views: 4,518
    05-24-2011, 11:57 PM Go to last post
  40. Analyzing with heavy skew, transforms not working?

    I have a set with around 200 individuals dealing with cognitive task scores. Most of it is skewed heavily and I'm trying to analyze ideally with a...

    Started by excellrec‎, 05-19-2011 02:25 PM
    • Replies: 7
    • Views: 2,768
    05-24-2011, 06:08 PM Go to last post
  41. 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: 18,287
    06-14-2011, 12:14 AM Go to last post
  42. P Value...should I trust it ?

    Hello, I am trying to detect significant differences in response of some device, among two groups: healthy and sick people. I ran a t-test,...

    Started by NN_STAT‎, 07-28-2011 02:00 AM
    • Replies: 7
    • Views: 3,503
    07-28-2011, 10:47 AM Go to last post
  43. On what statistical significance test should I use

    Hi everyone, First and foremost, my skills in statistics are quite basic so what I am about to ask may sound very stupid. That being said, here...

    Started by Applepip‎, 08-22-2011 06:22 PM
    • Replies: 7
    • Views: 2,260
    08-24-2011, 01:33 PM Go to last post
  44. paired or unpaired T-Test or even some other test?

    Hello there, I am trying to help out some students of medicine who are writing at their phd-thesis in germany. they have data from several...

    Started by Kullukschan‎, 09-14-2011 11:50 AM
    • Replies: 7
    • Views: 3,634
    09-14-2011, 07:18 PM Go to last post
  45. How to Analyze this data?

    OK…so I am having difficulty trying to decide exactly how best to analyze the following data. Specifically, I am trying to determine the possible...

    Started by DFoley‎, 10-03-2011 06:02 PM
    • Replies: 7
    • Views: 3,158
    10-05-2011, 11:38 AM Go to last post
  46. non-significant Paired T-test, what happens next??

    Hi, I'm analysing my data for my master's dissertation and I'm having problems! I have 3 "before" and "after" treatment groups (n=20 each) and...

    Started by Joelle‎, 10-30-2011 12:48 PM
    anova, paired t-test
    • Replies: 7
    • Views: 8,147
    11-09-2011, 12:42 PM Go to last post
  47. 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: 2,996
    01-27-2012, 04:37 AM Go to last post
  48. Red face Convergent and Divergent Validity

    Is it possible to make a multimethod-multitrait matrix of tests with different number of items? example: Test 1 consists of 5 categories with 24...

    Started by mae‎, 03-05-2012 10:07 AM
    • Replies: 7
    • Views: 3,601
    03-06-2012, 10:30 AM Go to last post
  49. Methodology For Sports Statistics Projections

    Good day! I am new to statistics and I want to try my hand at creating sports statistics projections. I'm posting in this thread because my first...

    Started by mightyeskimo‎, 03-05-2012 02:22 PM
    • Replies: 7
    • Views: 3,751
    03-07-2012, 01:08 PM Go to last post
  50. Counter-intuitive results with Bold-Brunell panel data estimator (DV-INDEX)

    Hi All, I am doing Brunell-Bond panel data analysis and the results seem completely counter-intuitive. The DV is a food prices index - and so if...

    Started by SylviaS‎, 04-09-2012 01:53 PM
    • Replies: 7
    • Views: 1,958
    04-09-2012, 03:23 PM Go to last post
  51. Correlations between twins - who is X and wo is Y?

    I have some data on twins (all fraternal) and I'm trying to see if there is any correlation between them on several measures (e.g., body...

    Started by andrewkent‎, 05-24-2012 02:50 PM
    correlation, twin studies, twins
    • Replies: 7
    • Views: 2,681
    05-24-2012, 04:33 PM Go to last post
  52. Student -T with big sample

    If the population variance is unknown and the sample size is >30, can I proceed to use Student-T to compute confidence interval ? or I have to use ...

    Started by ryan8200‎, 05-25-2012 04:22 AM
    • Replies: 7
    • Views: 2,384
    05-28-2012, 02:04 AM Go to last post
  53. Test of Significance advice needed

    I'm currently in high school doing my IB. I've been sifting through hundreds of CAT scans and x-rays that have been kindly donated to me by various...

    Started by SomeGuy‎, 06-20-2012 11:31 PM
    • Replies: 7
    • Views: 2,070
    07-12-2012, 07:48 PM Go to last post
  54. simple multivariate question

    I have, I think, a simple question about multivariate statistics, and I'm not sure which test (or even what kind of test does this). I have 40...

    Started by jbc165‎, 07-01-2012 02:24 PM
    multivariate, time series
    • Replies: 7
    • Views: 2,411
    07-16-2012, 03:46 PM Go to last post
  55. Mutlivariate Analysis/Using Controls

    Disclaimer: I'm a student in the social sciences with *very* elementary training in quantitative methods. If I am testing the relationship...

    Started by SG5‎, 08-07-2012 10:49 PM
    • Replies: 7
    • Views: 1,951
    08-17-2012, 10:22 AM Go to last post
  56. small sample size

    Hi! I want to compare 27 groups with each other, with each group consisting out of 3 or 4 samples. Can I use a one-way ANOVA or Kruskal-Wallis test...

    Started by Ine‎, 08-22-2012 07:06 AM
    • Replies: 7
    • Views: 1,585
    10-30-2012, 12:03 AM Go to last post
  57. 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: 2,592
    09-18-2012, 09:55 AM Go to last post
  58. 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?

    Started by sampier85‎, 09-18-2012 04:25 PM
    applied statistics, psychology, regression analysis
    • Replies: 7
    • Views: 2,352
    09-20-2012, 12:48 PM Go to last post
  59. Calculate SD from mean and 95% CI

    Dear Friends I'm reading a paper that has the following table: Year, n, measure (SD) 2008, 536 0.25 (0.13) 2010, 536 0.21...

    Started by SiBorg‎, 10-03-2012 03:58 PM
    • Replies: 7
    • Views: 4,604
    10-03-2012, 06:31 PM Go to last post
  60. How does observation error effect a minimal sample size for a t test?

    Hello, I calculate minimal sample size to compare means of two groups (different treatment) of datapoints by a t test. For continuously...

    Started by bondsergey‎, 10-26-2012 12:11 PM
    • Replies: 7
    • Views: 1,998
    10-30-2012, 05:54 PM Go to last post

+ Post New Thread
Page 4 of 54 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 ... LastLast

Thread Display Options

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.

Order threads in...

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

Icon Legend

Contains unread posts
Contains unread posts
Contains no unread posts
Contains no unread posts
More than 15 replies or 300 views
Hot thread with unread posts
More than 15 replies or 300 views
Hot thread with no unread posts
Closed Thread
Thread is closed
Thread Contains a Message Written By You
You have posted in this thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats