Scatterplots & Trend Lines

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 positive association in a scatterplot indicate?

Back

A positive association indicates 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 indicates that as one variable increases, the other variable tends to decrease.

Front

What does 'no association' mean in the context of scatterplots?

Back

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

Front

What is a trend line?

Back

A trend line is a straight line that best represents the data on a scatterplot, showing the general direction of the data points.

Front

How do you determine the slope of a trend line?

Back

The slope of a trend line is determined by the change in the y-values divided by the change in the x-values between two points on the line.

Front

What is correlation?

Back

Correlation is a statistical measure that describes the strength and direction of a relationship between two variables.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation indicates that one variable directly affects the other.

Front

How can you identify a negative relationship in a scatterplot?

Back

A negative relationship is identified when the trend line slopes downward from left to right, indicating that as one variable increases, the other decreases.

Front

What does it mean if a scatterplot has a strong correlation?

Back

A strong correlation means that the data points are closely clustered around the trend line, indicating a consistent relationship between the variables.