correlation

  1. S

    Predictive model for Turnover - Correlation or Survival Analysis

    Question 1 - I a working on developing a model to predict employee turnover. The variables that I have are age, tenure, job satisfaction, role clarity etc. Through research papers I have found the correlation coefficient for these variables but I am not sure on how to develop a model around it...
  2. E

    How to do Kendall test with ordinal data

    Hi, I have the following profitability data: 1) Rankings of profitability for customers: 1, 2. ... 15 2) Categories of same customers, grouped after profitability (from 1 to 5): 5, 5, 5, 3, 4, 5, .... 5, 4 (15 in total) I have troubles finding the Kendall Tau...
  3. M

    software speed

    Not homework BTW ... I want to measure the processing time (performance) of some software under a set of fixed conditions. I have a means to log the start and stop of the processing. The only possible factors are some uncontrollable (noise) factors, e.g., the CPU and memory usage. Then there is...
  4. L

    Can correlation be used as a measure of accuracy?

    I have a paired data set of known age and estimated age, and correlation tests show that there is a strong correlation between the two, but what I want to know is, does that mean the estimates are accurate? My thinking is no, correlation cannot tell you if the estimated age is accurate, but...
  5. T

    Trouble comparing variables in SPSS to one set of rules

    Hi guys! I am a little puzzled. :confused::confused: I am carrying out research on cyclists perceived benefits of the supplements they take and comparing them to what is scientifically proven. So far I have inserted all my data into SPSS and I have grouped all the variables accordingly...
  6. A

    Average individual correlations or perform 1 set of correlations

    First of all thanks for your time reading this post. I got some issue with correlation analysis that I am not able to solve at all as for more people I ask, different opinions I get (including opinions read on this forum). I will try to explain my situation: I go 1200 data from different...
  7. J

    One-way ANOVA and planned comparisons - HELP!

    Hi all, I'm currently running a Psychology experiment: the effect of background music on memory and mood. I will be using SPSS to conduct two one-way ANOVAs (music + mood / music + memory), w/ planned comparisons. However, I also want to see the effect of mood on memory but I don't know how...
  8. A

    Panel data correlation

    In a panel dataset of multiple years and multiple countries, what is best practice for running correlations among variables? I know that pooling by both countries and years is not recommended. Is restricting instead by both country and year the preferred method? Or just by either one, country...
  9. J

    Can I use all correlation metrics also for time series?

    I was using the cross correlation function in R (ccf) until now to discover correlations and lags between two time series. I was wondering if I can use all other correlation metrics for time series as well or are there any restrictions with time series? For example I want to use Spearman's...
  10. S

    Which statistical test to use: 1000 pairs of ordinals

    Hello, I have a table of approximately 1000 pairs of values. x is an integer between 0 and 365, representing birthday y is an integer between 1 and 4, being a measure of achievement. I am investigating whether there is positive correlation between x and y. I am not sure which test to use. I...
  11. P

    Multiple Imputation in R on variable with repeated measurements

    Hello! I am working with an occupation cohort exposed to radiation and have a dataset containing a number of variables on each worker, including their job title, year of birth, radiation exposure level, and the date on which the radiation sample was collected. Some of the radiation exposure...
  12. M

    Help finding appropriate test when observations are non-independent

    I have a data set consisting of data from 7 islands. I have measured the average gene flow between each pair of islands as well as the difference in temperature between each pair of islands. I want to know whether these to variables (average gene flow and "thermal mismatch" are correlated)...
  13. S

    Using Chi-square test for testing correlation between more than two variables

    Hi, I don't have deep knowledge in statistic, and I have been googling for an answer to my question, but i got no luck. Hopefully i found an answer here regardless to how stupid my question might be... I knew from my little knowledge, I can determine the correlation/association/dependency...
  14. B

    Partial Cross-correlation function - how to compute it on R

    I am getting desperate. Computing a cross-correlation function on R is easy: ccf(x,y, ...) and it's done. But what about computing a Partial cross-correlation function? It's crazy. I've been looking everywhere, but cannot find a function for doing this on R. :-(. By any chance does...
  15. Lazar

    weighted correlation

    Hi Folks, So I have data that looks like: myData <- structure(list(total = c(0.154, 0.223, 0.252, 0.157, 0.196, 0.252, 0.198, 0.162, 0.222, 0.135, 0.196, 0.193, 0.192, 0.274, 0.177, 0.17, 0.214, 0.214, 0.107, 0.22, 0.177, 0.177, 0.165, 0.226, 0.196, 0.267, 0.174, 0.12, 0.159), totalse...
  16. Junes

    how to determine qualitative dispersion over time with differing sample sizes

    I've been working on a study with workers at a certain plant, to test their safety awareness. During a meeting, everyone is asked to select a card that represents the risk that they feel is most prominent for a certain task. There are 15 different cards Our hypothesis is that over time...
  17. A

    Arithmetic/Log returns of positive/negative/0 values

    I'm trying to work out the correlation between movements in prices of 2 products i'm tracking. I will extend this to around 20 products but just want to get the basics done first...The problem I have is that the prices I have are sometimes negative or 0 and this causes a problem with log...
  18. A

    Running multple, multiple regressions? which statistical test should i use?

    I have done a study on whether personality and demographics predict interaction on facebook brand pages. I have used a Big five personality scale and the demographics include, sex, age, marital status, employment status and education level. Interaction was measured using 6 questions, such...
  19. S

    Is it possible to have covariance zero?

    Hello, I am doing my homework for statistic course, and I've got some problems with a test. So I put these data in excel and then calculated covariance...and it's zero! Am I missing something? Can you please help me solving this issue? Thanks a lot, Best regards
  20. T

    Do clothes or underwear express character?

    Background I am a university level psychologists-come-English-conversation teacher, that directs student psychology even though I don't have much of a clue about stats. Generally I get my undergrad students to do a simple correlation research survey to test a hypothesis. We also use t-tests in...