What is Considered to Be a "Strong" Correlation?

What does a Pearson correlation coefficient of 1 indicate?

• No linear correlation

• A perfectly negative linear correlation

• A perfectly positive linear correlation

• A nonlinear relationship

What is the rule of thumb for a 'strong' correlation in most fields?

• r > 0.3

• r > 0.75

• r > 0.5

• r > 0.9

In the medical field, what might be considered a 'strong' correlation?

• r = 0.9

• r = 0.3

• r = 0.5

• r = 0.75

Why is it useful to create a scatterplot when studying the relationship between two variables?

• To determine the mode

• To identify outliers and nonlinear relationships

• To calculate the mean

• To find the median

What does a Pearson correlation coefficient of 0 indicate?

• A nonlinear relationship

• A perfectly positive linear correlation

• No linear correlation

• A perfectly negative linear correlation

What happens to the correlation coefficient if there is an extreme outlier in the dataset?

• It becomes zero

• It can dramatically change

• It decreases

• It remains the same

What is an example of a strong positive correlation?

• Marketing dollars spent and total income earned

• The older a chicken becomes, the less eggs they produce

• The more hours a student studies, the higher their exam score

• The temperature outside and the number of ice cream cones sold

What is an example of a strong negative correlation?

• Marketing dollars spent and total income earned

• The temperature outside and the number of ice cream cones sold

• The more hours a student studies, the higher their exam score

• The older a chicken becomes, the less eggs they produce

What does a Pearson correlation coefficient measure?

• The nonlinear association between two variables

• The median of two variables

• The mean of two variables

• The linear association between two variables