5. In a study on speed and braking distance, researchers looked for a method to estimate how fast a person was traveling before an accident by measuring the length of their skid marks. An area that was focused on in the study was the distance required to

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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5. In a study on speed and braking distance, researchers
looked for a method to estimate how fast a person
was traveling before an accident by measuring the
length of their skid marks. An area that was focused
on in the study was the distance required to
completely stop a vehicle at various speeds. Use the
following table to answer the questions
MPH Braking distance (feet)
20
20
30 45
40
81
50
133
60
205
80
411
(Assume MPH is going to be used to predict
stopping distance.)
a) Find the linear regression equation
b) What does the slope tell you about MPH and the
braking distance? How about the y intercept?
c) Find the braking distance when MPH=45
Transcribed Image Text:5. In a study on speed and braking distance, researchers looked for a method to estimate how fast a person was traveling before an accident by measuring the length of their skid marks. An area that was focused on in the study was the distance required to completely stop a vehicle at various speeds. Use the following table to answer the questions MPH Braking distance (feet) 20 20 30 45 40 81 50 133 60 205 80 411 (Assume MPH is going to be used to predict stopping distance.) a) Find the linear regression equation b) What does the slope tell you about MPH and the braking distance? How about the y intercept? c) Find the braking distance when MPH=45
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