1. Announcement:
    Want access to a chatbox?
    Dason ‎(Devorador de queso)
+ Post New Thread
Page 6 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 24 25 ... LastLast
Threads 301 to 360 of 3209

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: 19,375
    10-11-2014, 12:02 PM Go to last post
  1. What model - combining data

    Hi, I have attached a data file which shows 4 ways of describing the same thing. Each way is a small table of 5 numbers. If I explain whats...

    Started by models‎, 06-20-2016 05:32 AM
    • Replies: 2
    • Views: 2,310
    06-23-2016, 03:08 AM Go to last post
  2. Model Fit is Too Perfect: RMSEA & CFI are perfect; SRMR varies in invariance analyses

    I am running models looking at the fit of new self-report scale I have developed (CFA and measurement invariance by a number of different categories...

    Started by mem162000‎, 01-15-2014 01:47 PM
    • Replies: 9
    • Views: 18,468
    06-22-2016, 03:37 AM Go to last post
  3. Using Factor Scores in Discriminant Analysis

    I am doing research on whether corporations that engage in earnings fraud can be identified up to three years before the fraud occurs. My end result...

    Started by ceilylou‎, 06-21-2016 01:05 PM
    discriminant analisys, factor analyses
    • Replies: 3
    • Views: 904
    06-21-2016, 04:40 PM Go to last post
  4. Which method? Categorical data (IV) and continuous numerical data (DV)

    Thanks in advance for taking a look at my query I have been trying to get some statistical support from my local research department but I am...

    Started by dwilding‎, 06-21-2016 06:17 AM
    categorical data, kruskal-wallis, logistical regresion, one way anova, regression
    • Replies: 0
    • Views: 1,725
    06-21-2016, 06:17 AM Go to last post
  5. Percent From The Critical Value

    Afternoon, Here is one I haven't experienced before and haven't seen discussed: I have a series of goodness-of-fit tests using chi-square a few...

    Started by c4sadler‎, 06-20-2016 01:46 PM
    • Replies: 0
    • Views: 1,172
    06-20-2016, 01:46 PM Go to last post
  6. Genes comparison in SPSS

    Hey guys, I have an excel sheet I imported to SPSS all the rows are genes (over 3200), and for each gene I have its expression level in 6...

    Started by XPeriment‎, 06-18-2016 11:30 PM
    • Replies: 1
    • Views: 1,386
    06-19-2016, 03:38 AM Go to last post
  7. Population Estimation

    Hello, new member here and I've been looking for a way to make a number cruncher for a (imaginary) colony of creatures for an RP I'm making. I'm...

    Started by ravni‎, 06-15-2016 07:59 AM
    population modeling, population statistics
    • Replies: 6
    • Views: 2,506
    06-16-2016, 08:05 AM Go to last post
  8. Welch ANOVA and covariates

    I had planned, because of lack of homogeneity of variance for some of my variables (homoscedasticity) to run a Welch's ANOVA and to use...

    Started by lsrms3‎, 06-15-2016 01:34 PM
    ancova, anova, covariate, covariates, welch
    • Replies: 0
    • Views: 2,552
    06-15-2016, 01:34 PM Go to last post
  9. What model should I use? Mixed-effect model?

    Hello guys, I really hope you can help me with this. Any ideas/suggestions are welcome. My main goal is to create a model that predicts which...

    Started by Marvin85‎, 03-16-2016 02:22 PM
    • Replies: 13
    • Views: 2,945
    06-14-2016, 11:05 PM Go to last post
  10. large cell counts - Fisher's Exact vs. chi2

    Hi everyone, I read a while back that chi2 was most accurate for observed cell counts of only between 5-70, but now I can't find that reference. I'm...

    Started by DrStatman‎, 06-09-2016 10:54 PM
    chi-squared, exact test
    • Replies: 2
    • Views: 1,049
    06-14-2016, 04:27 AM Go to last post
  11. Estimation of suitable significance level for high numbers of experiments

    I am a scientist and work with high numbers of experiments. For example: I have tested 1000 different parameters between 2 groups. I found 10...

    Started by AntonS1988‎, 06-13-2016 11:37 AM
    binomial, experiment, false positive, high numbers, significance level
    • Replies: 0
    • Views: 1,110
    06-13-2016, 11:37 AM Go to last post
  12. ttest for comparison of group means from pooled samples

    Hello, I have results from an experiment where a number (n=50) of biological samples were pooled together with a single measurement of chemical...

    Started by edfromdetroit‎, 06-09-2016 09:38 AM
    aggregate data, pooled samples, ttest
    • Replies: 0
    • Views: 833
    06-09-2016, 09:38 AM Go to last post
  13. Which Non-parametric Significance Test Should I Use?

    Hi, I've been working on a little project. Last year I delivered pizzas. I recorded data for 300 of my deliveries like tip amounts, order totals,...

    Started by 13gentj‎, 06-07-2016 08:36 PM
    exact test, fail assumptions, non-normal, permutation test, randomization test
    • Replies: 5
    • Views: 2,238
    06-09-2016, 02:34 AM Go to last post
  14. Compound poisson gamma model and biomass data

    I have some biomass data (total count -discrete- of individuals and total dry weight -continuous-) that I would like to model with environmental...

    Started by Nono75‎, 06-07-2016 09:26 AM
    data analysis, modeling techniques
    • Replies: 1
    • Views: 1,628
    06-07-2016, 01:12 PM Go to last post
  15. Census data: Should I worry about sample size and pvalues?

    Hi all, I have a questions regarding statistical power and sample size. (1) Do I have to worry about sample size in a multiple logistic regression...

    Started by Marvin85‎, 06-03-2016 03:51 PM
    census data, logistic, sample size, statistical power
    • Replies: 6
    • Views: 1,750
    06-07-2016, 08:22 AM Go to last post
  16. Considering Skewness and Kurtosis

    Hello All, With test data the parameters were created for mean, standard deviation and the two other moments. I then take look at samples one at...

    Started by mike121‎, 06-05-2016 12:40 AM
    • Replies: 0
    • Views: 1,787
    06-05-2016, 12:40 AM Go to last post
  17. Generating Skewed Normal Distributions

    I want to generate Random Normal Distributions with specific degrees of Skewness and Kurtosis. So far I have looked at the following two approaches:...

    Started by kanny_g‎, 02-04-2009 04:33 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 43,730
    06-03-2016, 10:10 PM Go to last post
  18. a completely randomized experimental design and regression

    A company studied the effects of three different methods of promotions on sales of its crackers (labeled as Treatment 1 to 3). Fifteen stores were...

    Started by eunkum‎, 06-02-2016 10:54 AM
    • Replies: 1
    • Views: 1,914
    06-02-2016, 02:38 PM Go to last post
  19. Need Help on Method Analysis

    Hi, i am currently doing a research for my project and it requires me to use statistical analysis to validate the data. I am not sure on which method...

    Started by arezeem‎, 06-01-2016 11:03 PM
    • Replies: 0
    • Views: 1,804
    06-01-2016, 11:03 PM Go to last post
  20. Need help with Power Analysis

    Hello, i am performing Welch's Anova as my data lack homegeneity, and post hoc testing with Games Howell. My problem is that i cannot find power for...

    Started by m1chael‎, 05-30-2016 08:50 AM
    • Replies: 1
    • Views: 1,198
    05-31-2016, 04:22 AM Go to last post
  21. Need help with power analysis GPower Novice

    Hello everyone. I am doing a power test for Fishers Exact Test on GPower, and dont know how to determine the proportions p1 and p2. I have 2...

    Started by ANCOVA'D‎, 05-26-2016 01:32 PM
    power calculation, sample size
    • Replies: 0
    • Views: 999
    05-26-2016, 01:32 PM Go to last post
  22. Necessary condition analysis

    Hi, I have a research problem where I have to identify a necessary condition. I have three data series, X, Y, Z. say, Z is the dependent variable and...

    Started by fellow‎, 05-15-2012 12:09 AM
    necessary condition, sufficient condition
    • Replies: 1
    • Views: 2,129
    05-25-2016, 02:48 PM Go to last post
  23. Suggest me a test

    im doing a thesis titled 'Impact of banning smartphone on employee engagement on next generation employees' h0: banning smartphone has no such...

    Started by taify‎, 05-25-2016 11:27 AM
    • Replies: 0
    • Views: 521
    05-25-2016, 11:27 AM Go to last post
  24. help needed with Fishers Exact Test (power calculation)

    Hello everyone. Hope someone can help me. I am running a Fisher exact 4 X 2 table analysis in SPSS. I have been informed its the correct test to...

    Started by ANCOVA'D‎, 05-25-2016 03:49 AM
    chi square, fishers exact, power analysis, power calculation
    • Replies: 0
    • Views: 762
    05-25-2016, 03:49 AM Go to last post
  25. 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: 1,478
    05-22-2016, 07:15 AM Go to last post
  26. Chi-square instead of Multiple Regression Analysis

    Can someone help me? How can I explain that I used Chi-square test of association instead of Multiple Linear Regression Analysis because I had...

    Started by choco21lit‎, 05-21-2016 11:45 AM
    • Replies: 0
    • Views: 912
    05-21-2016, 11:45 AM Go to last post
  27. How to apply syntax to specific data?

    Hi there - I need to convert some raw data into categories via a calculation which turns the raw data into angles (to establish specific groups). I...

    Started by littleone‎, 05-17-2016 09:50 AM
    • Replies: 0
    • Views: 963
    05-17-2016, 09:50 AM Go to last post
  28. Suggest a research design.

    I am currently doing research assignment which is to design a program evaluation and need to seek advise on some research questions. As a person...

    Started by jackfood‎, 05-17-2016 08:54 AM
    • Replies: 0
    • Views: 556
    05-17-2016, 08:54 AM Go to last post
  29. Standard error of measurement (SEM) consistency - what's the formula?

    Hello, everyone How to calculate the standard error of measurement (SEM) but for consistency? I would like to find the formula and the paper which...

    Started by Rod_py‎, 05-13-2016 11:47 AM
    reliability analysis
    • Replies: 0
    • Views: 783
    05-13-2016, 11:47 AM Go to last post
  30. Smile [SPSS - Hypothesis testing] Controlling for a variable. ANCOVA?

    Hi! I am using open data from New York City's yellow cabs and the in 2013 introduced citibikes (bikesharing service) to see if the introduction of...

    Started by dippedinice‎, 05-12-2016 03:18 PM
    hypothesis testing, spss
    • Replies: 0
    • Views: 676
    05-12-2016, 03:18 PM Go to last post
  31. Pre and Post with Treatment group - ANOVA , ANCOVA, Regress differences???

    Hello friends, My main task is to "test" if staff member who participated in the counseling sessions had fewer "Use of Force (UOF)" incidents in...

    Started by Marvin85‎, 05-11-2016 11:19 AM
    ancova, anova, pre post
    • Replies: 4
    • Views: 1,987
    05-12-2016, 10:00 AM Go to last post
  32. How to perform reverse score transformations? (non-normal data)

    Hello, Sadly, my data are significantly non-normal, negatively and not positively skewed, so that leaves me, according to some statisticians, with...

    Started by biancaelenai‎, 05-12-2016 03:54 AM
    data transformation, non-normality, skewness
    • Replies: 1
    • Views: 1,215
    05-12-2016, 06:13 AM Go to last post
  33. Evaluation of Bayesian Model

    How can I evaluate if a created bayesian model is reliable model that makes good predication? To conclude if the created bayesian model produces a...

    Started by ozkan‎, 05-09-2016 05:41 AM
    bayesian, reliability
    • Replies: 1
    • Views: 1,173
    05-11-2016, 02:03 AM Go to last post
  34. Problem in Structural Breaks

    Suppose, if I draw samples of different sizes at time t=1,2,..,T,T+1,..,2T where the sample sizes could be different and the observed variable is a...

    Started by abhic_1983‎, 05-10-2016 12:17 AM
    bai-perron test, shapiro wilk, structural breaks
    • Replies: 0
    • Views: 1,157
    05-10-2016, 12:17 AM Go to last post
  35. Difference between expected spending and observed spending. What kind of statistical

    I would like some advice from you about what kind of statistical analysis I could do about that data. My case is as follows: According to a...

    Started by pelluzi‎, 05-04-2016 12:02 AM
    anova, chi sq, chi square, f-test, hyposteses testing
    • Replies: 0
    • Views: 2,308
    05-04-2016, 12:02 AM Go to last post
  36. Randomised Complete Block Design (RCBD)

    During the cotton-spinning process, a strand of cotton thicker than the final thread is produced, and then twisted before it is wound onto a bobbin....

    Started by eunkum‎, 05-03-2016 01:36 PM
    • Replies: 0
    • Views: 1,211
    05-03-2016, 01:36 PM Go to last post
  37. Threshold Autoregressive (TAR) Model with exogenous variables (TARX)

    Anyone have experience with these models? From what I remember about VAR is that adding exogenous variables to model a VARX is straightforward....

    Started by ELMST‎, 05-02-2016 07:42 PM
    tar, tarx, var, varx
    • Replies: 0
    • Views: 831
    05-02-2016, 07:42 PM Go to last post
  38. Average height of population

    I am trying to figure out how many samples to take from known population to be accurate within 95%. For example to find average height and...

    Started by mike121‎, 04-28-2016 08:56 PM
    • Replies: 0
    • Views: 833
    04-28-2016, 08:56 PM Go to last post
  39. chi square test to test difference for 5x2

    My data has two groups people, VV and NV, and I want to test the difference in their occupation. The occupation were 5 groups: farm/fh, farmer/fh,...

    Started by fengyuwuzu‎, 04-27-2016 07:04 PM
    • Replies: 1
    • Views: 1,614
    04-27-2016, 07:47 PM Go to last post
  40. Need help for an analysis

    Hi I'm working in a textile company that have stores in many countries.While planning quantities of product,we are considering of product display...

    Started by munire‎, 04-27-2016 02:26 PM
    • Replies: 0
    • Views: 1,346
    04-27-2016, 02:26 PM Go to last post
  41. Post Need help for my data analysis

    Hi, I need help in analysing the data that I have collected for my final year dissertation. Kindly find the data sheet attached. I need to...

    Started by priyankashree‎, 04-27-2016 04:18 AM
    • Replies: 1
    • Views: 895
    04-27-2016, 04:50 AM Go to last post
  42. Staff performance comparison between staff and overall metric

    "Age Group" "Members in 2015" "Complaints in (2015)" "Staff 1 Members in 2016" "Staff 1 Complaints in 2016" "Staff 2 Members in 2016" "Staff 2...

    Started by venky80‎, 04-22-2016 11:25 AM
    • Replies: 0
    • Views: 1,628
    04-22-2016, 11:25 AM Go to last post
  43. Standard deviation

    I have a population of 229, the mean is 20.8 and the standard deviation is 24.6. What can be concluded from this? Is this significant?

    Started by Damara‎, 04-19-2016 05:21 PM
    • Replies: 0
    • Views: 1,284
    04-19-2016, 05:21 PM Go to last post
  44. How to apply Chi Squared test according to this Simulation?

    Hi there, I have been wondering about some points of Chi squared test. I would like to introduce the following scenario to better clarify my...

    Started by pelluzi‎, 04-19-2016 04:24 PM
    anova, chi sq test, chi square test, chi squared
    • Replies: 0
    • Views: 952
    04-19-2016, 04:24 PM Go to last post
  45. Need a methodology to predict car sales from various showrooms in a district

    Data Assumptions: The sales on a particular day is always 60 There are 3 showrooms in the district There are other factors too(I have omitted the...

    Started by simplequestions‎, 04-19-2016 04:44 AM
    • Replies: 0
    • Views: 1,090
    04-19-2016, 04:44 AM Go to last post
  46. Policy chance analysis - time series count data

    Hi, I need some help to determine my approach. For a school project I would like to examine the effect of a policy change in the Danish...

    Started by flickerbrood‎, 04-18-2016 07:01 AM
    count data, statistical analysis, time series
    • Replies: 0
    • Views: 979
    04-18-2016, 07:01 AM Go to last post
  47. What statistical test should I use to test for statistical significance?

    Hello fellow members, I haven't been using statistics for a long time and I have trouble recalling statistical tests and their use. I hope you can...

    Started by Tanja.M‎, 04-17-2016 10:27 AM
    • Replies: 1
    • Views: 1,522
    04-18-2016, 01:48 AM Go to last post
  48. How can I analyse this data is the best way possible?

    How can I investigate the theory that a relationship between two variables, X and Y is 'Y in proportion to X^3/4' within a population where I can...

    Started by Amritanar‎, 04-17-2016 04:46 AM
    • Replies: 0
    • Views: 915
    04-17-2016, 04:46 AM Go to last post
  49. Time Series - Difference over time

    Hello, I'm new in the time series, so I need some help. I have a short time series (5 quarters), with the proportion of a parameter (public...

    Started by wisit‎, 03-08-2016 10:52 AM
    difference, proportion, significance, time series
    • Replies: 3
    • Views: 2,257
    04-15-2016, 02:15 AM Go to last post
  50. How can I best analyze this data

    I have some data I am trying to analyze but was hoping to get some stats help with it. I'm not sure what the best way to analyze it is. I'm...

    Started by YellowM3‎, 01-24-2016 07:19 PM
    • Replies: 4
    • Views: 2,640
    04-13-2016, 04:04 PM Go to last post
  51. Talking Should I use a Weighted Average? HELP!

    Hi All - first post here and advanced warning I'm no stats wiz, but need the kind help of y'all. I have a huge dataset I am working with and trying...

    Started by IllegallyUnanalytical‎, 03-29-2016 08:12 PM
    • Replies: 2
    • Views: 1,707
    04-13-2016, 03:49 PM Go to last post
  52. standardize by population density

    I have a variable called "number of events" for each state. It is a raw number of event that happened during a specific time frame. I was thinking I...

    Started by grayskillen‎, 04-11-2016 09:57 AM
    population, rates, standardization
    • Replies: 0
    • Views: 626
    04-11-2016, 09:57 AM Go to last post
  53. Question on the merits of mediation analysis Vs another analysis (described within)

    Hello, I have a dataset involving an intervention (placebo versus real) - denoted as X, an outcome (Y), and a physiological variable (M) that I...

    Started by Siobh‎, 04-05-2016 07:40 AM
    correlation, intervention-analysis, mediation analysis, regression
    • Replies: 0
    • Views: 1,423
    04-05-2016, 07:40 AM Go to last post
  54. Estimating location of lower tail

    Say I have a sample, assumed from a Normal Distribution. I want to find a confidence interval for this parameter: L = \mu - \alpha * \sigma ...

    Started by EdddieB1985‎, 03-31-2016 12:40 AM
    confidence interval, estimation, standard error
    • Replies: 2
    • Views: 1,713
    03-31-2016, 11:58 AM Go to last post
  55. Talking Clinical Trial - sample size for statistically comparable data?

    Hi Everyone In a nutshell - I am looking to undertake an 8 week clinical trial of an equine veterinary health product. I am wanting to analyse...

    Started by WildlifeStats‎, 03-29-2016 05:25 AM
    clinical trial, placebo, sample size, sample size calculation, sample size determination
    • Replies: 1
    • Views: 854
    03-29-2016, 08:03 AM Go to last post
  56. Non-Inferiority Test in Multple Logistic Model

    Does any body have any insight or experience running a non-inferiority test based on multiple linear or logistic regression. So perhaps mean and risk...

    Started by hlsmith‎, 03-24-2016 11:59 AM
    • Replies: 1
    • Views: 1,314
    03-28-2016, 01:22 PM Go to last post
  57. Do i use an ANCOVA for a cross over of exams, pre/post study?

    I have a study i am running and would like to know the appropriate test to apply, its complicated but bear with me :) Background: We are looking...

    Started by Damo123‎, 03-24-2016 12:35 PM
    • Replies: 0
    • Views: 2,999
    03-24-2016, 12:35 PM Go to last post
  58. Confidence Intervals in a research paper

    Hi, all. I'm writing a paper on concussion data from the NFL Surveillance System, and I want to be able to put the data analysis from the journal...

    Started by leafonthewind‎, 03-23-2016 01:13 PM
    confidence intervals, independent events, p value, research article
    • Replies: 3
    • Views: 3,673
    03-24-2016, 07:42 AM Go to last post
  59. Question The null hypothesis

    Hi everybody, I would like to hear from you your suggestions, I would be grateful to your help and thank you in advance for your help. I am a...

    Started by Rachi‎, 03-21-2016 05:50 PM
    • Replies: 2
    • Views: 2,056
    03-22-2016, 11:40 AM Go to last post
  60. Post Principal component analysis (PCA) on clustered data

    Hi Everyone, I am analysing data about physical condition tests on students belonging to different type of schools (general, professional,...

    Started by AkaKiwi‎, 03-18-2016 10:40 AM
    • Replies: 3
    • Views: 1,739
    03-21-2016, 03:18 AM Go to last post

+ Post New Thread
Page 6 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 24 25 ... 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