Chapter 3-correlation

Question 1

Purpose of Correlation

Answer 1

To determine the extent to which changes in scores for 2 variables are related

Question 2

Pearson Correlation Coefficient def

Answer 2

QUANTITATIVE description of the DIRECTION and STRENGTH of a straight-line relationship between 2 variables.

Question 3

Correlation Coefficient Range

Answer 3

-1 to 1

Question 4

We cannot use Pearson’s r for _____

Answer 4

Non-linear relationships
-> Non-linear relationships cannot be described, regardless of their strength.

Question 5

The correlation is strongly affected by _____.

Answer 5

outliers
-> When outliers are present, correlation should be used cautiously.