Given the following summary data from a sample of size 9, what is the slope of the least-squares line for r and y? Σ-2Σu= 3125 E = 70.50 EI:1 = 902.25 E = 11,626.75 A. .089 В. 13.150 С. 13.052 D. 10.603 E. None of the above

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Suppose that given a particular dataset of (x, y) pairs, the correlation coef-
ficient (r) of the least-squares line is -.98. What conclusion can we draw from this
19.
information?
A. X and Y have a strong linear correlation
B. X and Y have a moderate linear correlation
C. X and Y have a weak linear correlation
D. X and Y are not linearly correlated
E. None of the above
20.
Given the following summary data from a sample of size 9, what is the slope
of the least-squares line for x and y?
E; = 24
Σ-70.50 Σ- - 902.25
Ev = 11, 626.75
Yi = 312.5
%3D
A. .089
В. 13.150
C. 13.052
D. 10.603
E. None of the above
Transcribed Image Text:Suppose that given a particular dataset of (x, y) pairs, the correlation coef- ficient (r) of the least-squares line is -.98. What conclusion can we draw from this 19. information? A. X and Y have a strong linear correlation B. X and Y have a moderate linear correlation C. X and Y have a weak linear correlation D. X and Y are not linearly correlated E. None of the above 20. Given the following summary data from a sample of size 9, what is the slope of the least-squares line for x and y? E; = 24 Σ-70.50 Σ- - 902.25 Ev = 11, 626.75 Yi = 312.5 %3D A. .089 В. 13.150 C. 13.052 D. 10.603 E. None of the above
Expert Solution
Step 1

20)

Formula for slope:

slope=nxy-xynx2-x2

Substitute the given values in the above formula.

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