Author Question: In a comprehensive road test on new car models, one variable measured is the time it takes the car ... (Read 76 times)

tiara099 · **on:** Feb 14, 2020

Question 1

Consider the following pairs of observations:

x	2	3	5	5	6
y	1.3	1.6	2.1	2.2	2.7

Find and interpret the value of the coefficient of determination.

Question 2

In a comprehensive road test on new car models, one variable measured is the time it takes the car to accelerate from 0 to 60 miles per hour. To model acceleration time, a regression analysis is conducted on a random sample of 129 new cars.

TIME60:

y = Elapsed time (in seconds) from 0 mph to 60 mph

MAX	x = Maximum speed attained (miles per hour)

The simple linear model E(y) = β₀ + β₁x was fit to the data. Computer printouts for the analysis are given below:

NWEIGHTED LEAST SQUARES LINEAR REGRESSION OF TIME60

CASES INCLUDED 129 MISSING CASES 0

Approximately what percentage of the sample variation in acceleration time can be explained by the simple linear model?
◦ 70%
◦ 8%
◦ -17%
◦ 0%

briseldagonzales · **Reply #1 on:** Feb 14, 2020

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