Useful tips for everyday
How to calculate the Bernoulli distribution in R? We can now apply the dbern function of the Rlab R package to our vector of quantiles…
What is the difference between Neyman allocation and optimum allocation? A Neyman allocation scheme provides the most precision for estimating a population mean given a…
What is bias term in linear regression? Bias Term in Linear Regression For any given phenomenon, the bias term we include in our equations is…
Why is a good idea to use a validation set? Validation set actually can be regarded as a part of training set, because it is…
What is the maximum likelihood estimator of lambda? STEP 1 Calculate the likelihood function L(λ). log(xi!) STEP 3 Differentiate logL(λ) with respect to λ, and…
What is a geometric distribution in statistics? The geometric distribution is a special case of the negative binomial distribution. It deals with the number of…
Can linear regression be performed after linear PCA? Hierarchical linear regression can help answer this question. If your data is complex (i.e. you have many…
What is the probability of rolling two 6 sided dice and getting a 4? Two (6-sided) dice roll probability table Roll a… Probability 2 1/36…
How does degrees of freedom affect t-distribution? One of the interesting properties of the t-distribution is that the greater the degrees of freedom, the more…
How to read and interpret a regression table? Each individual coefficient is interpreted as the average increase in the response variable for each one unit…