Scatter Plots and Trend Lines

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive correlation in a scatter plot indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also increases.

Front

What does a negative correlation in a scatter plot indicate?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What does it mean if there is no correlation in a scatter plot?

Back

No correlation means that there is no apparent relationship between the two variables.

Front

How do you interpret a trend line in a scatter plot?

Back

A trend line shows the general direction of the data points and can be used to make predictions about one variable based on the other.

Front

What is the purpose of using a trend line?

Back

The purpose of a trend line is to summarize the relationship between variables and to help predict future values.

Front

How can you use a trend line to make predictions?

Back

You can extend the trend line to estimate the value of one variable based on a known value of the other variable.

Front

What does it mean if a scatter plot has a steep trend line?

Back

A steep trend line indicates a strong relationship between the two variables, meaning small changes in one variable result in large changes in the other.

Front

What does it mean if a scatter plot has a flat trend line?

Back

A flat trend line indicates a weak relationship between the two variables, meaning changes in one variable have little effect on the other.

Front

What is the significance of outliers in a scatter plot?

Back

Outliers are data points that differ significantly from other observations and can affect the overall trend and interpretation of the data.