5.28(a) is greater than zero.(b) is less than zero.(c) can't be determined without seeing the data.The software used to compute the least-squaresregression line in Question 5.25 says that r² = 0.98.This suggests that(a) although degree-days and gas used are correlated,degree-days do not predict gas used very accurately.(b) gas used increases by √0.98 0.99 cubic feet foreach additional degree-day.(c) prediction of gas used from degree-days will be quiteaccurate.

The value of the coefficient of determination is r2=0.98

Answered: 3 The software used to compute the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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3 The software used to compute the least-squares regression line in Question 5.25 says that r² = 0.98. This suggests that (a) although degree-days and gas used are correlated, degree-days do not predict gas used very accurately. (b) gas used increases by 98 0.99 cubic feet for -