Scatterplots, Trend lines, Correlation

Front

What is a scatter plot?

Back

A graph that shows the relationship of two data sets.

Front

What does a correlation coefficient of r = -0.26 indicate?

Back

Negative, weak correlation.

Front

Which scatter plot shows a linear relationship between x and y?

Back

Graph C.

Front

What does a correlation coefficient of r = 0.90 indicate?

Back

Positive, strong correlation.

Front

What is a line of best fit used for?

Back

To make predictions.

Front

What is correlation in statistics?

Back

A measure of the relationship between two variables.

Front

What does a positive correlation mean?

Back

As one variable increases, the other variable also increases.

Front

What does a negative correlation mean?

Back

As one variable increases, the other variable decreases.

Front

What is the range of correlation coefficients?

Back

From -1 to +1.

Front

What does a correlation coefficient of r = 0 indicate?

Back

No correlation.