Lecture 1

Question 1

Statistical vs machine learning

Answer 1

Statistical learning focuses on inferences while machine learning focuses on prediction.

Question 2

Prediction

Answer 2

Predictions: Ability to predict what the responses are going to be to future input variables

Question 3

Supervised

Answer 3

Characterized by the presence of “answers” in the data set which are utilized to supervise the algorithm

Question 4

Training vs Testing

Answer 4

Training: Will be the “Old data” used to fit data

Testing: Is strictly used to evaluate performance

Question 5

Inference

Answer 5

Gain insights about underlying data generation process, relationships between variables, or the impact of certain factors.

To draw conclusions or make statements about the population or data generating mechanism

Question 6

unsupervised

Answer 6

Attempts to learn relationships and patterns from data that are not labeled in any way.