correlation analysis

  1. W

    Comparing Data from Value-Based Scales with Frequency-Based Scales

    I was recently asked to correlate scores between two surveys that supposedly measure similar constructs. One has a value-based scale (very like me, somewhat like me, neither like or unlike me, somewhat Unlike me, very unlike me). The other has a frequency-based scale (never, rarely, sometimes...
  2. S

    Correlation with control group

    Hi! Sorry if this is a very basic question. If you have two groups: diseased and control. Both groups undergoes an intervention giving you two time points (before and after). Say you measure weight and glucose uptake at both time points, and want to correlate the change in these...
  3. G

    Correlation between two time series

    Hi, I'm having 120 paired monthly observations from two series: Series#1: Are you going to buy a house within the next six months (Yes-No, from statistical sample). Series#2: Total house deals in the market within six months. I am wondering how to test the validity of the survey through a...
  4. 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...
  5. C

    Statistical analysis on online betting industry?

    Hi! i'm currently working for an online betting company and i would need some help on how to come up with risk indications. I believe some statistical tools may help me assess the gravity of risk of a certain event or user. For example: 1. a certain player bets on an average of 100 per bet...
  6. V

    Anova? Manova? multiple T-tests? (newbie question warning)

    Hello all I have study data to analyze, and my normal stats guru is out of town. The study (some facts altered to protect the innocent) goes like this: Research question: Do jumping-jacks have a significant effect on the body? 10 subjects came into the lab (individually). They had 5...
  7. T

    [Parametric/Non-Parametric Correlation] - Which should be used?

    I have a data set consisting of waist size (cm) and weight (kg) of a group of people. I am looking to see if the two variables are related, and I assume a correlation test is the method I should be using (I apologise - I'm very new to SPSS and stat analysis in general). I understand that the...
  8. T

    Correlation test for PCA

    Hello, I have done two independent PCA (Principal component analysis) with two different datasets in R. I have made interpolated geographic maps with the first PC which show the same pattern for both analysis but the comparison solely based on the maps is not enough for me. I want to do a...
  9. B

    Correlation vs ANOVA

    Hi, I am trying to figure out which type of statistics to use for my research project. My knowledge of stats is limited so hopefully this makes sense! I am doing an exploratory, mixed-mehtods research project. I am looking at the type of computer programs teachers use and how they relate to...
  10. M

    Correlation between normal and exponential

    Can anybody give me some pointers to how to compute confidence intervals for Pearson correlation in the case (X,Y) where X is normal and Y is exponential? I cannot find it anywhere (usually just bivariate normal) - and I guess that this case is common enough to be described somewhere!
  11. K

    Pseudo-time lapse experiment: repeated measures ANOVA??

    I am measuring disease severity, using 5 different types of measurements, in animals treated with drug X, over multiple timepoints. The measurements can only be made when the animal is dissected. We have 30 animals, all given the same drug X on day 0, and 5 animals are taken down every 2 days...
  12. K

    Comparing two methods to measure disease severity

    I am testing a new, fast method to score disease severity in an animal model of a human disease. M appears to be less sensitive than the gold standard scoring method, G. G is discrete and has a range (0,1,2...20). M is continuous and varies from 0 to 1. The linear correlation coef between...
  13. W

    Correlation of Leading & Lagging Indicators

    Greetings. I am working on a organizational performance dashboard for my company. I have identified lagging and leading indicators in five domains of the organization that are critical to ongoing success of the firm. These indicators are essentially organizational metrics. I want to...
  14. D

    Statistic Analysis & Variable type questions

    Hello! My dissertation mentor has only told me that any methodology option would be valuable which really hasn't provided me much guidance, so I'm hoping to find some guidance here. My study is investigating the relationship between number of years enrolled in a music class and overall...
  15. A

    Correlation Analysis Against Artificial / Ranked Factor(s)

    Guys, I have an interesting situation here and a few questions related. Let me sketch it out. SITUATION: Someone conducted a correlation analysis and they claim correlation exists, they found it, it's strong/valid, they separated correctly based on found factors. Overall, the point of...