Useful tips for everyday
What happens when you subtract two normal distributions? In other words, the mean of the combined distribution is found by SUBTRACTING the two individual means…
How is the F-statistic related to the t statistic? Understanding the t-test as a variance ratio test, and why t2 = F. It is often…
Why do you include quadratic terms in interactions in lmer? I have a mixed model with a logarithmized response variable and three predictors. One of…
How to interpret the coefficients of linear regression? A positive coefficient means that an increase X i is associated with an increase in Y, and…
Which is the method of moments estimator of μ? We just need to put a hat (^) on the parameters to make it clear that…
What is moving average span? The most common time periods used in moving averages are 15, 20, 30, 50, 100, and 200 days. The shorter…
Can SPSS Do ridge regression? The application of Ridge Regression involves the selection of a bias parameter and it is not clear if it works…
How to fit generalized additive models using GAM? Let’s now fit an actual generalized additive model using the same cubic spline as our basis. We…
When do you include an interaction in glmer? That is, when including an interaction, as a general rule you also need to include the main…
How many possibilities are there for a coin toss? The number of possible outcomes equals the number of outcomes per coin (2) raised to the…