SRM Exam Chapter 1: Statistical Learning questions well answered to pass

SRM Exam Chapter 1: Statistical
Learning

Response - correct answer ✔✔A variable of primary interest



Explanatory - correct answer ✔✔A variable used to study the response variable



aka predictors or features



Count - correct answer ✔✔A quantitative variable usually valid on non-negative integers



Continuous - correct answer ✔✔A real-valued quantitative variable



Nominal - correct answer ✔✔A categorical/qualitative variable having categories without a meaningful
or logical order



Ordinal - correct answer ✔✔A categorical/qualitative variable having categories with a meaningful or
logical order



y, Y - correct answer ✔✔Response variable



x, X - correct answer ✔✔Explanatory variable



Subscript i - correct answer ✔✔Distinguish between variables/represent observations



n - correct answer ✔✔Number of observations



Subscript j - correct answer ✔✔Index for variables except response

, p - correct answer ✔✔Number of variables except response



A^T - correct answer ✔✔Transpose of matrix A



A^(-1) - correct answer ✔✔Inverse of matrix A



ε - correct answer ✔✔Error term



y^hat, Y^hat, f^hat(x) - correct answer ✔✔Estimate/Estimator of 𝑓(𝑥)



Statistical Learning Problems - correct answer ✔✔Supervised

Unsupervised



Supervised Learning - correct answer ✔✔Analyzes the data with a response variable



Supervised Learning Examples - correct answer ✔✔Linear Models

Non-Linear Models

Time Series



Unsupervised Learning - correct answer ✔✔Analyzes the data without a response variable



Unsupervised Learning Examples - correct answer ✔✔Clustering

PCA



Supervised Statistical Learning Problems - correct answer ✔✔Regression

Classification



Regression - correct answer ✔✔Quantitative response variable