Scatter Plots and Correlation

Front

What does a correlation coefficient (r) of 0.3 indicate?

Back

Weak positive correlation.

Front

What type of association is indicated by a positive correlation?

Back

As one variable increases, the other variable also increases.

Front

If Joe earned $400 and the graph shows he worked 25 hours, what can we infer about the relationship between hours worked and earnings?

Back

There is a positive correlation between hours worked and earnings.

Front

What is the expected correlation between study time and test grades?

Back

Positive correlation.

Front

How would you describe a strong positive correlation in a scatter plot?

Back

Data points are closely clustered around a line that slopes upwards.

Front

What does a negative correlation indicate?

Back

As one variable increases, the other variable decreases.

Front

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

Back

-1 to 1.

Front

What does a correlation coefficient of -0.8 suggest?

Back

Strong negative correlation.

Front

What type of correlation is represented by a scatter plot with no discernible pattern?

Back

No correlation.

Front

How can you determine the strength of a correlation from a scatter plot?

Back

By observing how closely the data points cluster around a line.