Which statement about correlation is true?
I.Regression based on data that are summary statistics tends to result in a higher
Correlation.
II. $\text { If } r = 0.95 , \text { the response variable increases as the explanatory variable increases. }$
III.An outlier always decreases the correlation.

A)I only
B)II only
C)III only
D)I, II, and III
E)none of these

Question

Which statement about correlation is true?
I.Regression based on data that are summary statistics tends to result in a higher
Correlation.
II. $\text { If } r = 0.95 , \text { the response variable increases as the explanatory variable increases. }$
III.An outlier always decreases the correlation.

A)I only
B)II only
C)III only
D)I, II, and III
E)none of these

Quizplus · Accepted Answer

Regression based on summary statistics often results in a higher correlation because it reduces variability. Statement II is not necessarily true as correlation does not imply causation, and statement III is false because an outlier can either increase or decrease the correlation depending on its position relative to the data.