Useful tips for everyday
What is economic stationarity? Statistical stationarity: A stationary time series is one whose statistical properties such as mean, variance, autocorrelation, etc. are all constant over…
How do you calculate RMSE time series? Calculate your pace. Take your running time and divide it by the distance you ran. For example, if…
How do you know if a sample observation is independent? Independent Observations Two observations are independent if the occurrence of one observation provides no information…
How is statistics used in data science? Data scientists use a combination of statistical formulas and computer algorithms to notice patterns and trends within data.…
What is P value of Kolmogorov-Smirnov test? STUDENT’S T-TEST The result, P-value, tells you how likely these samples comes from the exact same distribution. When…
What is MTRY parameter in random forest? Number of variables available for splitting at each tree node. In the random forests literature, this is referred…
How to initialize centroids for k-mean clustering? Method for initialization: ‘ k-means++ ‘: selects initial cluster centers for k-mean clustering in a smart way to…
How do I choose Kmeans? The Elbow Method This is probably the most well-known method for determining the optimal number of clusters. It is also…
How do you determine model performance in predictive modeling? To evaluate how good your regression model is, you can use the following metrics: R-squared: indicate…
Why Random forests are usually faster in training than a bagging of decision trees? Random forests is great with high dimensional data since we are…