Useful tips for everyday
What is a paired or correlated groups t-test? A paired t-test (also known as a dependent or correlated t-test) is a statistical test that compares…
Is 0.33 A strong correlation? Values between 0.3 and 0.7 (-0.3 and -0.7) indicate a moderate positive (negative) linear relationship via a fuzzy-firm linear rule.…
How to quantify typical differences between distributions? So the q+ (1-q) plot suggests that the two groups differ, with maximum differences in the tails, and…
When referring to the normal probability distribution there is not just one there is a family? When referring to the normal probability distribution, there is…
What happens when you standardize variables? In statistics, standardized variables are variables that have been standardized to have a mean of 0 and a standard…
What is the difference between drift and trend? Drift is an intercept(static) component in a time series. c being the drift(intercept) component here. Trend is…
What is the alternative to a null hypothesis? The null hypothesis, H0 is the commonly accepted fact; it is the opposite of the alternate hypothesis.…
What is likelihood function for linear regression? Linear regression is a model for predicting a numerical quantity and maximum likelihood estimation is a probabilistic framework…
How do you calculate convergent validity? Convergent validity can be estimated using correlation coefficients. A successful evaluation of convergent validity shows that a test of…
How to find a multivariate conditional distribution for height? Suppose that the weights (lbs) and heights (inches) of undergraduate college men have a multivariate normal…