x 13 32 50 28 50 25 y 1 2 6 5 9 3 a.given Σx = 198, Σy = 26, Σx2 = 7602, Σy2 = 156, Σxy = 1042, and r ≈ 0.8553 b. Find x, and y. Then find the equation of the least-squares line ŷ = a + bx. (Round your answers to four decimal places.) x= y= ŷ= c. Find the value of the coefficient of determination r2. What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? What percentage is unexplained? (Round your answer for r2 to four decimal places. Round your answers for the percentages to two decimal place.) r2= explained= % unexplained= % d. For a neighborhood with x = 35 hundred jobs, how many are predicted to be entry level jobs? (Round your answer to two decimal places.) hundred jobs
x 13 32 50 28 50 25 y 1 2 6 5 9 3 a.given Σx = 198, Σy = 26, Σx2 = 7602, Σy2 = 156, Σxy = 1042, and r ≈ 0.8553 b. Find x, and y. Then find the equation of the least-squares line ŷ = a + bx. (Round your answers to four decimal places.) x= y= ŷ= c. Find the value of the coefficient of determination r2. What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? What percentage is unexplained? (Round your answer for r2 to four decimal places. Round your answers for the percentages to two decimal place.) r2= explained= % unexplained= % d. For a neighborhood with x = 35 hundred jobs, how many are predicted to be entry level jobs? (Round your answer to two decimal places.) hundred jobs
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
| x | 13 | 32 | 50 | 28 | 50 | 25 |
|---|---|---|---|---|---|---|
| y | 1 | 2 | 6 | 5 | 9 | 3 |
a.given Σx = 198, Σy = 26, Σx2 = 7602, Σy2 = 156, Σxy = 1042, and r ≈ 0.8553
b. Find x, and y. Then find the equation of the least-squares line ŷ = a + bx. (Round your answers to four decimal places.)
x=
y=
ŷ=
c. Find the value of the coefficient of determination r2. What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? What percentage is unexplained? (Round your answer for r2 to four decimal places. Round your answers for the percentages to two decimal place.)
r2=
explained= %
unexplained= %
d. For a neighborhood with x = 35 hundred jobs, how many are predicted to be entry level jobs? (Round your answer to two decimal places.)
hundred jobs
Expert Solution
Step 1
For given data
Find
( a ) Verify
Σx = 198, Σy = 26, Σx2 = 7602, Σy2 = 156, Σxy = 1042, and r ≈ 0.8553
( b )
Find x bar and y bar
find the equation of the least-squares line ŷ = a + bx
( c )
r2=
explained= %
unexplained= %
( d )
For a neighborhood with x = 35 hundred jobs, how many are predicted to be entry level jobs?
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