Useful tips for everyday
When can you say without loss of generality? Let’s say you’re trying to prove something about an arbitrary circle. Without loss of generality, you can…
Which distribution is typically used with over-dispersed data? Poisson distribution The most common distribution for analyzing count data, the Poisson distribution, assumes a variance equal…
How are inferential statistics used in the real world? Revised on March 2, 2021. While descriptive statistics summarize the characteristics of a data set, inferential…
What is a one sided distribution? A one-tailed test is a statistical test in which the critical area of a distribution is one-sided so that…
When would you use a Dirichlet distribution? Dirichlet distributions are most commonly used as the prior distribution of categorical variables or multinomial variables in Bayesian…
What happens to MSE when sample size increases? But essentially what you will observe is, if you increase the sample size, the MSE will converge…
What are the assumptions of K-Means clustering? k-means assume the variance of the distribution of each attribute (variable) is spherical; all variables have the same…
How to calculate correlation between two categorical variables? Finally, with the rise of categorical variables in datasets, it is important to calculate correlations between this…
What is the stated preference method? What are stated preference methods? Without trying to give a rigorous definition, we can say that the term “stated…
Do you collect data before hypothesis? In an ideal methodology, you would first draw your hypothesis before collecting data and testing your model. This means…