Scatterplots

Front

What is a scatterplot?

Back

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

Front

What does a trend line in a scatterplot represent?

Back

A trend line indicates the general direction or pattern of the data points in a scatterplot, helping to visualize the relationship between the variables.

Front

What does a positive association in a scatterplot indicate?

Back

A positive association means that as one variable increases, the other variable also tends to increase.

Front

What does a negative association in a scatterplot indicate?

Back

A negative association means that as one variable increases, the other variable tends to decrease.

Front

What is no association in a scatterplot?

Back

No association means there is no discernible relationship between the two variables; changes in one do not affect the other.

Front

How can you predict values using a scatterplot?

Back

You can predict values by using the trend line to estimate the value of one variable based on the value of the other.

Front

What is correlation in the context of scatterplots?

Back

Correlation refers to the strength and direction of the relationship between two variables as shown in a scatterplot.

Front

What is a correlation coefficient?

Back

A correlation coefficient is a numerical measure that indicates the strength and direction of a linear relationship between two variables.

Front

What does it mean if the correlation coefficient is close to 1?

Back

If the correlation coefficient is close to 1, it indicates a strong positive linear relationship between the two variables.

Front

What does it mean if the correlation coefficient is close to -1?

Back

If the correlation coefficient is close to -1, it indicates a strong negative linear relationship between the two variables.