Chapter 7 Review

Front

What is the correlation coefficient for a perfect negative correlation?

Back

-1

Front

Which scatter plot diagram shows the strongest positive correlation?

Back

The scatter plot with points closest to a straight line sloping upwards.

Front

What type of correlation exists between outside temperature and the amount of layers you wear?

Back

Negative correlation.

Front

What does a correlation coefficient of -0.19 indicate about the strength of the correlation?

Back

It indicates a weak negative correlation.

Front

For what type of functions is the correlation coefficient (r) useful?

Back

Linear functions.

Front

What is a positive correlation?

Back

A relationship where as one variable increases, the other variable also increases.

Front

What is a negative correlation?

Back

A relationship where as one variable increases, the other variable decreases.

Front

What does a correlation coefficient of 0 indicate?

Back

No correlation between the variables.

Front

What is the range of possible values for a correlation coefficient?

Back

From -1 to +1.

Front

What does a correlation coefficient of +0.85 indicate?

Back

A strong positive correlation.