Useful tips for everyday
What test is used to compare medians? Mood’s median test is a nonparametric test to compare the medians of two independent samples. It is also…
Is scaling data necessary? Feature scaling is essential for machine learning algorithms that calculate distances between data. If not scale, the feature with a higher…
Is it a mistake to use are squared? Using R-squared to justify the “goodness” of our model in this instance would be a mistake. Hopefully…
How do you calculate sample size for Ab test? Another way to calculate the sample size for an AB test is by using the confidence…
How do you interpret comparative index? Comparative Fit Index (CFI) If the index is greater than one, it is set at one and if less…
How do you determine if a survey is statistically significant? You may be able to detect a statistically significant difference by increasing your sample size.…
How to calculate the autocovariance of AR ( 1 )? I want to understand the calculations that there are behind the general formula of the…
How do you convert odds ratio to risk ratio? To convert an odds ratio to a risk ratio, you can use “RR = OR /…
What is a margin in SVM? The SVM in particular defines the criterion to be looking for a decision surface that is maximally far away…
How to fit Statsmodels to a sarimax model? I fit a statsmodels.tsa.statespace.sarimax.SARIMAX model ( statsmodels==0.8.0) but I’m getting unexpected forecasting behavior, in which the forecast…