Useful tips for everyday
Is covariance matrix is better than correlation matrix? The values from PCA while using the correlation matrix are closer to each other and more uniform…
How do you know if a crosstab is statistically significant? Crosstabulation is a statistical technique used to display a breakdown of the data by these…
Do we overestimate the within variability The impact of measurement error on intraclass coefficient estimation? Theorem 1 highlights that the within-variance estimator applied to a…
How do you find the sensitivity of a screening test? The sensitivity of that test is calculated as the number of diseased that are correctly…
Is Pearson better than Spearman? The difference between the Pearson correlation and the Spearman correlation is that the Pearson is most appropriate for measurements taken…
What does perplexity do in t-SNE? A second feature of t-SNE is a tuneable parameter, “perplexity,” which says (loosely) how to balance attention between local…
What is root mean square error? Root mean squared error (RMSE) is the square root of the mean of the square of all of the…
How do you prevent false positives and false negatives? How to reduce False Positive and False Negative in binary… firstly random forest overfits if the…
What is correct when testing a hypothesis? Hypothesis testing is used to assess the plausibility of a hypothesis by using sample data. The test provides…
Is GAM a machine learning? GAM — under the hood In this context, generalized additive models (GAM) offer a middle ground between simple models, such…