bivariate

  1. M

    Pcfinhom and Kcross.inhom unexpected behavior, heterogeneity or not?

    I am currently analyzing the spatial patterns of a tree species using the " spatstat " package - point pattern analysis (pcf, pcfinhom, pcfcross.inhom, Kcross.inhom). I struggle with heterogeneity and bandwidth (selection) concepts and functions output (strange graphs). I posted the data and the...
  2. S

    Generating data from exponential distribution in r.

    Suppose X~exp(.67), Y~exp(.8), Z~exp(.43). X and Y are correlated with a correlation coefficient of -0.6. Again X and Z are correlated with a correlation coefficient of -0.6. How can I generate data from X, Y and Z by incorporating this correlation. I know if they were uncorrelated, I could...
  3. K

    time series with bivariate data?

    I have a datetime (yearly) variable which indicates when/if a subject registered, a count of the 400,000 subjects who registered at each facility and those subjects identified as being asked a particular question upon registration, a dichotomous yes/no. The requester asked that their time to...
  4. J

    Help with interpreting results of a bivariate probit regression please

    I have recently run this regression using Stata and the command biprobit. However, I am a complete newbie to statistics and I need some help interpreting the results. I am mostly confused by the Rho and Wald Chi2 results. A simple explanation would be much appreciated. I have attached a...
  5. D

    Bonferroni correction for bivariate correlation

    Hi all, First of all my level of stats knowledge is fairly basic! I am currently running multiple bivariate correlations on data from a number of self report questionnaires. This has resulted in many significant correlations, and my supervisor has suggested I use the Bonferroni correction to...
  6. victorxstc

    Univariate, Bivariate, Multivariate: Myths and facts

    This is not a question but a summarization of my recent learnings regarding the common mistakes in calling different types of analyses, and to address the proper names for them. I now know that a multiple regression is not a multivariate analysis, although I have seen millions of incorrect...
  7. F

    Comparing Slopes Best Fit Lines Between 2 Groups

    So lets say I have 2 data sets. Both sets contain various types of information about a person, including age as well as other factors relating to health (eg. cholesterol, blood pressure, etc) The difference between the sets is that set 1 is sampled from the general population and set 2 is...
  8. M

    Gaussian Kernel regressions plot

    Hey everyone, I'm trying to make a specific plot in SAS of two variables, X and Y. I want to run a Kernel regression of two variables, X and Y, and then using those results plot the two in a two-dimensional diagram with X on the X-axis and Y on the Y-axis represented by a smooth curve. All...
  9. R

    confused by this statement on bivariate and multivariate

    Hi, I am stuck on this statement: Variables were included in the multivariate analysis if they had a P value of 0.10 in the bivariate analysis. I thought P value of 0.05 or lower meant that the findings were signifcant and we disregard anything above that. No? Please explain. I am just...