Chapter 3

author: jakwisn

1. Select true statements based on information below

is true variable

is prediction of

and are coefficients

is responsible for "slope" of the line

2. Select true statements

While fitting linear (not polynomial) regression RSS always can be equal to 0

Coefficients can be found only throught iterative optimization methods

Standard error for is dependent on n, therefore biased, but it is asymtotically unbiased

Standard error for is dependent on n, therefore biased, but it is asymtotically unbiased

Standard errors cannot be used to perform hypothesis test on coefficients

3. Look at formulas below and answer the questions:

where

now please select true statements

TSS measures the total variance in the response Y

is always between 0 and 1

measures the proportion of variability in Y that can be explained using X