Scatterplots and associations

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables where each point represents an observation. It helps to visualize the relationship between the variables.

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 a scatterplot?

Back

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

Front

What are the axes of a scatterplot typically labeled with?

Back

The horizontal axis (x-axis) is usually labeled with the independent variable, while the vertical axis (y-axis) is labeled with the dependent variable.

Front

What type of variables are typically represented in a scatterplot?

Back

Scatterplots typically represent quantitative variables, which can take on a range of numerical values.

Front

How can you determine the strength of an association in a scatterplot?

Back

The strength of an association can be determined by how closely the points cluster around a line or curve; tighter clusters indicate stronger associations.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to identify relationships, trends, and patterns between two variables, making them useful for exploratory data analysis.

Front

What is an example of a positive association in real life?

Back

An example of a positive association is the relationship between hours studied and exam scores; generally, more hours studied lead to higher scores.

Front

What is an example of a negative association in real life?

Back

An example of a negative association is the relationship between the amount of exercise and body weight; typically, more exercise leads to lower body weight.