correlation coefficients

  1. J

    Find Correlations

    Let's say I have some samples, that I gathered per second, like these Number km Benzine Speed Weight 1 10 100 80 100 2 20 90 100 120 3 30 80 80 110 with thousand of samples and more than twenty features (like speed and...
  2. J

    Comparing Correlation Coefficients

    I currently work in the field of imaging. My question is in regards to comparing correlation coefficients. I have two image sets (which have an attached correlation coefficient) one has n1 number of image slices and the other has n2 number of image slices where n1 is not equal to n2. I...
  3. S

    Correlation

    I have a number of studies I am looking at and trying to compare their correlation coefficients ... esentially do a meta-analysis of correlation coefficients. I have been using Practical Meta-analysis by Lipsey and Wilson, but have not made much progress. I've also found some online resources...
  4. S

    Measuring the presence of a correlation

    1. Given a frequency data set (collected from 10 users by letting them watch certain videos and asking some questions about the videos) how do I determine any correlation between two variables (`Correctly guessed` and `Correctly memorized`) and calculate the significance level? Video...
  5. D

    Different correlation coefficients

    How can i compare the results determined by different correlation coefficients between different type of variables? Two of the three variables are nominal, the other is interval. I used Phi coefficient for nominal-nominal and Point biserial for nominal-interval. How can i compare two...
  6. L

    testing differences between correlation coefficients from the same sample and related

    Hi! The reason I am posting yet another question on testing for significant differences between correlation coefficients is that I can not seem to find the answer for my data anywhere...:shakehead I have 5 correlations. These are obtained from the same sample. They are related in an even...
  7. B

    Rank-biserial and point biserial correlation coefficients in SPSS +

    Hi there, I have tow questions regarding these analyses that I am yet to find an answer for. 1) Rank-biserial Is it possible to run this in SPSS? I have not found this option within the program and cannot find relevant advice on any forums. I am looking for relationships between sets of...
  8. S

    IQ/achievement test correlation (rxy)

    Working on creating new regression tables for determining the presence of learning disabilities. In order to do this, I need to determine a correlation coefficient between each test that is compared. Some correlation coefficients are listed in test manuals, most are not. What are your thoughts...