(Unit 3 Review) Correlation and Line of Fit Practice

Front

What does a correlation coefficient (r) of 0 indicate?

Back

There is no correlation between the variables.

Front

What is the purpose of a line of best fit?

Back

To make predictions based on the data.

Front

TRUE OR FALSE: A strong correlation means that the data points are very close to the line of best fit.

Back

True

Front

What happens to y when x increases in a negative correlation?

Back

y decreases.

Front

What does it mean if the number of data points above the trend line is equal to those below it?

Back

The line of best fit is accurately representing the data.

Front

What is a scatter plot?

Back

A graph that shows the relationship between two variables using dots.

Front

What does a positive correlation look like on a scatter plot?

Back

As one variable increases, the other variable also increases.

Front

What is the range of possible values for the correlation coefficient (r)?

Back

From -1 to 1.

Front

What does a correlation coefficient (r) of -1 indicate?

Back

A perfect negative correlation.

Front

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

Back

Changes in one variable do not predict changes in the other.