Chapter 3-correlation Flashcards
1
Q
Purpose of Correlation
A
To determine the extent to which changes in scores for 2 variables are related
2
Q
Pearson Correlation Coefficient def
A
QUANTITATIVE description of the DIRECTION and STRENGTH of a straight-line relationship between 2 variables.
3
Q
Correlation Coefficient Range
A
-1 to 1
4
Q
We cannot use Pearson’s r for _____
A
Non-linear relationships
-> Non-linear relationships cannot be described, regardless of their strength.
5
Q
The correlation is strongly affected by _____.
A
outliers
-> When outliers are present, correlation should be used cautiously.
