Useful tips for everyday
How do I test normality for two independent groups? You can use Kolmogorov Smirnov test for testing normality of two independent groups. When the test…
When do you need to estimate the covariance matrix? Many statistical problems require the estimation of a population’s covariance matrix, which can be seen as…
Why it is not possible to calculate OLS estimator in the case when the number of parameters is larger than the number of observations? The…
What are OLS assumptions? The Assumption of Linearity (OLS Assumption 1) – If you fit a linear model to a data that is non-linearly related,…
How is the Granger causality test used in real life? Granger causality test is used to determine if one time series will be useful to…
Can a machine learning model deal with categorical data? Models are unable to deal with categorical data left as is, categorical data must be converted…
How do you calculate the degrees of freedom for a SEM model? The degrees of freedom for the test of model fit will equal the…
How to scaling training set and test data? Using normalization, you make the scale of them the same as each other, helps accelerate the learning…
Is logistic regression suitable for multi class classification? By default, logistic regression cannot be used for classification tasks that have more than two class labels,…
What does false mean in Norm Dist? Function Description TRUE = Cumulative Normal Distribution Function FALSE = Normal Probability Density Function Which Excel function returns…