Useful tips for everyday
How do you express a probability distribution? Probability distributions indicate the likelihood of an event or outcome. Statisticians use the following notation to describe probabilities:…
What is the range of sigmoid or logistic activation function? The sigmoid activation function, also called the logistic function, is traditionally a very popular activation…
Can you calculate correlation for categorical variables? For a dichotomous categorical variable and a continuous variable you can calculate a Pearson correlation if the categorical…
How do you interpret regression variables? The sign of a regression coefficient tells you whether there is a positive or negative correlation between each independent…
What does the credible interval tell us? Content. Confidence intervals are measures of uncertainty around effect estimates. Interpretation of the Bayesian 95% confidence interval (which…
For what are similarity measures used in clustering? Clustering is done based on a similarity measure to group similar data objects together. This similarity measure…
How does multicollinearity affect regression coefficients? The coefficients become very sensitive to small changes in the model. Multicollinearity reduces the precision of the estimated coefficients,…
Is probit the same as logistic regression? So logistic and probit models can be used in the exact same situations. How do they differ? The…
How do we resolve the problem of heteroscedasticity? Weighted regression The idea is to give small weights to observations associated with higher variances to shrink…
How do you explain the concept of average? In maths, the average value in a set of numbers is the middle value, calculated by dividing…