Useful tips for everyday
Can you plot a multiple regression? If you have a multiple regression model with only two explanatory variables then you could try to make a…
Is elastic net better than Lasso and Ridge? Lasso will eliminate many features, and reduce overfitting in your linear model. Ridge will reduce the impact…
Is F-test always one tailed? To conclude: When comparing two groups, an F-test is always one-sided, but you can report a (more powerful) one-sided t-test…
How do you calculate goodness of fit in regression? R squared, the proportion of variation in the outcome Y, explained by the covariates X, is…
What is a numerical predictor? Numerical weather prediction (NWP) uses mathematical models of the atmosphere and oceans to predict the weather based on current weather…
Is there a significant difference between two proportions? Comparing two proportions, like comparing two means, is common. If two estimated proportions are different, it may…
Does boosting involve bootstrap sampling? Boosting does not involve bootstrap sampling; instead each tree is fit on a modified version of the original data set.…
What is kernel bandwidth? The bandwidth of the kernel is a free parameter which exhibits a strong influence on the resulting estimate. To illustrate its…
Is repeated measures ANOVA the same as one-way ANOVA? A repeated measures ANOVA is almost the same as one-way ANOVA, with one main difference: you…
What is x1 and x2 in statistics? xi represents the ith value of variable X. For the data, x1 = 21, x2 = 42, and…