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Interpret the Linear Correlation Coefficient
Grade Level
Praxis Core
5165.251 Interpret the Linear Correlation Coefficient
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All observations in a data set have the same x-value, while y varies. What should be said about Pearson r?
A
r is undefined because the x-variable has zero standard deviation.
B
r = -1 because the points form a vertical line.
C
r = 0 because vertical lines have no slope.
D
r = 1 because all x-values are identical.
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