Useful tips for everyday
How do you compare means across groups? In order to compare the means of more than two samples coming from different treatment groups that are…
What is exogenous variable in ARIMA? An exogenous variable is one whose value is determined outside the model and is imposed on the model. Many…
Why is scaling important for PCA? Scaling (what I would call centering and scaling) is very important for PCA because of the way that the…
Can a negative correlation have a positive slope? A positive value indicates a positive slope, while a negative value indicates a negative slope. In statistics,…
What is the relationship between confidence interval and confidence level? A confidence interval is a range of values that is likely to contain an unknown…
What is M in exponential distribution? The maximum value on the y-axis is always m, one divided by the mean. Try It 5.3. The amount…
Can I use paired t-test for Likert scale? The t-test makes no sense logically, because the tested hypothesis is about a mean difference, and “means”…
How are different conditions used in repeated measures? Where measurements are made under different conditions, the conditions are the levels (or related groups) of the…
Why is it better to use log in regression? Overfitting occurs when there are too many dependent variables in play that it does not have…
Why does SVM use hinge loss? SVM uses a hinge loss, which conceptually puts the emphasis on the boundary points. Anything farther than the closest…