Useful tips for everyday
Can an instrumental variable be correlated with other independent variables? The instrument cannot be correlated with the error term in the explanatory equation, conditionally on…
Can you run a regression with only categorical variables? Categorical variables require special attention in regression analysis because, unlike dichotomous or continuous variables, they cannot…
When should a parametric test be used? Parametric tests are used only where a normal distribution is assumed. The most widely used tests are the…
Does combining classifiers improve accuracy? One way to improve the accuracy of predictive modeling is by combining the models. This research tries to study local…
What is the name of the statistical test that is used to test differences in some dichotomous dependent variable that is measured at the nominal…
How do you reduce the dimensionality of data? Seven Techniques for Data Dimensionality Reduction Missing Values Ratio. Low Variance Filter. High Correlation Filter. Random Forests…
How do you know when to use binomial or Poisson? The Poisson is used as an approximation of the Binomial if n is large and…
Is the log likelihood of the saturated model in a GLM? In the help page of the Rfunction glm, under the item deviance, the document…
What should a control group include? The control group is composed of participants who do not receive the experimental treatment. When conducting an experiment, these…
What is Open Source Security Testing? The Open Source Security Testing Methodology Manual, or OSSTMM, is a peer-reviewed methodology for security testing, maintained by the…