Useful tips for everyday
What is the difference between validation and testing? Validation set is used for determining the parameters of the model, and test set is used for…
What is the region of rejection for a one tail Z test? Rejection region is in the negative section of the z (standard normal) distribution.…
Which chart type is ideal for visualizing financial data? cluster bar chart The cluster bar chart is often the first chart type to try when…
How do you know if data is accurate? How Do You Know If Your Data is Accurate? A case study using search volume, CTR, and…
How are confidence intervals constructed and how will you interpret them? A confidence interval displays the probability that a parameter will fall between a pair…
What is the rule of thumb for a sample size and to be considered large? A general rule of thumb for the Large Enough Sample…
How do I visualize a cluster in R? The function fviz_cluster() [factoextra package] can be used to easily visualize k-means clusters. It takes k-means results…
Does random forest use boosting or bagging? The random forest algorithm is actually a bagging algorithm: also here, we draw random bootstrap samples from your…
What are the criteria for defining the degree of freedom? Degrees of freedom, in a mechanics context, are specific, defined modes in which a mechanical…
Can I use Gan to generate training data? This is where deep learning can help! Using generative adversarial networks, or GANs, we can generate a…