Unit 10: Data Correlation

Front

What is a positive correlation?

Back

A positive correlation is a relationship between two variables where, as one variable increases, the other variable also increases.

Front

What does a correlation coefficient (r) indicate?

Back

The correlation coefficient (r) indicates the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Front

What is a negative correlation?

Back

A negative correlation is a relationship between two variables where, as one variable increases, the other variable decreases.

Front

What does a weak correlation mean?

Back

A weak correlation means that there is little to no relationship between the two variables, and changes in one variable do not predict changes in the other.

Front

What is a strong correlation?

Back

A strong correlation indicates a close relationship between two variables, where changes in one variable are closely associated with changes in the other.

Front

What is causation?

Back

Causation indicates that one event is the result of the occurrence of another event, meaning that changes in one variable directly cause changes in another.

Front

How does temperature affect ice cream sales?

Back

Typically, as the temperature increases, the number of customers in an ice cream shop also increases, indicating a positive correlation.

Front

What does it mean if there is no correlation between two variables?

Back

If there is no correlation, it means that changes in one variable do not affect or predict changes in the other variable.

Front

What is linear regression?

Back

Linear regression is a statistical method used to model the relationship between a dependent variable and one or more independent variables by fitting a linear equation to observed data.

Front

What is the slope in a linear regression equation?

Back

The slope indicates the rate of change of the dependent variable for each unit change in the independent variable.