Useful tips for everyday
What is the difference between equal width and equal frequency discretization? Equal Frequency Binning: bins have an equal frequency. Equal Width Binning : bins have…
How do I see the decision tree in Matlab? There are two ways to view a tree: view(tree) returns a text description and view(tree,’mode’,’graph’) returns…
How do you know if two sets of data are significantly different? The Students T-test (or t-test for short) is the most commonly used test…
What is non-parametric transformation? Non-parametric tests are commonly used when the data is not normally distributed. These tests are considered to be a type of…
Are all normal distributions unimodal? A normal distribution can be used to describe a variety of quantitative variables. A normal distribution curve is bell-shaped. The…
What is variable in big data? There are two types of variables you’ll find in your data – numerical and categorical. Numerical data can be…
Do you need to do correlation before regression? There is no correlation between certain variables. Remember, in linear regression the R in the model summary…
Is predictive modeling same as predictive analytics? Predictive Analytics Process Define Project: Define the project outcomes, deliverables, the scope of the effort, business objectives, identify…
What are hedonic regression models used to measure? Hedonic regression is the application of regression analysis to estimate the impact that various factors have on…
What is the difference between the chi squared goodness of fit test and the chi squared test of independence? The Chi-square test for independence looks…