Scatter Plots Review

Front

What is a scatter plot?

Back

A graph that shows the relationship of two data sets.

Front

If a scatterplot has no association, what does that mean?

Back

Its ordered pairs have no predictable pattern.

Front

What type of correlation exists between the number of siblings you have and your weight?

Back

No correlation.

Front

What does a positive correlation in a scatter plot indicate?

Back

As one variable increases, the other variable also increases.

Front

What does a negative correlation in a scatter plot indicate?

Back

As one variable increases, the other variable decreases.

Front

What is the purpose of a trend line in a scatter plot?

Back

To show the general direction of the data points.

Front

How can you determine the approximate value of a variable using a scatter plot?

Back

By locating the point on the scatter plot that corresponds to the known value and reading the associated value.

Front

What does it mean if a scatter plot shows a cluster of points?

Back

It indicates a strong relationship between the two variables.

Front

What is the equation of a trend line?

Back

A mathematical representation of the relationship between the variables in a scatter plot.

Front

How do you interpret the slope of a trend line?

Back

The slope indicates the rate of change between the two variables.