ISYE 6501 Midterm 1 QUESTIONS CORRECTLY ANSWERED LATEST UPDATE

ISYE 6501 Midterm 1 QUESTIONS CORRECTLY ANSWERED LATEST UPDATE Support Vector Machine(SVM) is a supervised machine learning algorithm used for? - ANSWER Classification How to split the data if we only have one model? - ANSWER 70% training data, 30% testing data How to split the data if we want to compare models? - ANSWER 70% training, 15% validation and 15% testing When do we need to do scaling in data? - ANSWER When our factors/attributes/dimensions are orders of magnitude different such as income vs. credit score (income is much much larger) Which type of classifier tend to be more overfitting? - ANSWER Soft classifier What is a measure of quality used in linear regression? - ANSWER R-squared or adjusted R-squared: shows how well your model explains the observed data. The higher R-squared, the better the model is expected to perform AIC, BIC: The lower AIC and BIC, the better the model fits Select where each data is categorical a. Education level b. GPA c. Gender d. Temperature - ANSWER a and c What type of data is used in CUSUM? - ANSWER time series data What type of data is used in Exponential Smoothing model? - ANSWER time series data What is GARCH do? - ANSWER variance estimation For KNN and K-means clustering, why is scaling important - ANSWER Otherwise some variables could be associated with more 'weight' reference: What are some ap