A newly-designed highway sign is being examined. 27 drivers, of various ages, were tested to see at what maximum distance (in feet) each driver could clearly read the sign. Each driver's age was also recorded. Some summary statistics are shown below: Column n Mean Std. Dev. Median Range Min Max Q1 Q3 age 27 51.33 21.944 55 64 18 82 28 71 distance 27 423.33 82.927 420 310 280 590 360 460 The correlation between age and distance is 0.796. a. Calculate the least-squares regression line for predicting distance from age. b. Refer to the previous question. Suppose that the age of the driver is 65 years old. Predicted the expected distance of a sign that the driver should be able to read.
A newly-designed highway sign is being examined. 27 drivers, of various ages, were tested to see at what maximum distance (in feet) each driver could clearly read the sign. Each driver's age was also recorded. Some summary statistics are shown below: Column n Mean Std. Dev. Median Range Min Max Q1 Q3 age 27 51.33 21.944 55 64 18 82 28 71 distance 27 423.33 82.927 420 310 280 590 360 460 The correlation between age and distance is 0.796. a. Calculate the least-squares regression line for predicting distance from age. b. Refer to the previous question. Suppose that the age of the driver is 65 years old. Predicted the expected distance of a sign that the driver should be able to read.
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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A newly-designed highway sign is being examined. 27 drivers, of various ages, were tested to see at what maximum distance (in feet) each driver could clearly read the sign. Each driver's age was also recorded. Some summary statistics are shown below:
Column n Mean Std. Dev.
age 27 51.33 21.944 55 64 18 82 28 71
distance 27 423.33 82.927 420 310 280 590 360 460
The
a. Calculate the least-squares regression line for predicting distance from age.
b. Refer to the previous question. Suppose that the age of the driver is 65 years old. Predicted the expected distance of a sign that the driver should be able to read.
Transcribed Image Text:Column
n
Mean
Std. Dev. Median Range Min Max
Q1
Q3
age
27 51.33
21.944
55
64
18 82
28
71
distance
27 423.33
82.927
420
310
280 590 360 460
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