Scatterplots HW ASSIGNMENT

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables. Each point on the graph represents an observation.

Front

What do the axes represent in a scatterplot?

Back

The horizontal axis (x-axis) represents one variable, while the vertical axis (y-axis) represents another variable.

Front

How do you interpret the correlation in a scatterplot?

Back

Correlation in a scatterplot indicates the strength and direction of a relationship between two variables. A positive correlation means that as one variable increases, the other also increases. A negative correlation means that as one variable increases, the other decreases.

Front

What does it mean if a scatterplot shows no correlation?

Back

If a scatterplot shows no correlation, it means there is no apparent relationship between the two variables; the points are scattered randomly.

Front

What is a trend line in a scatterplot?

Back

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

Front

What is the purpose of using a scatterplot?

Back

The purpose of using a scatterplot is to visually display the relationship between two variables and to identify patterns, trends, or correlations.

Front

What does a steep slope in a trend line indicate?

Back

A steep slope in a trend line indicates a strong relationship between the two variables, meaning that a small change in one variable results in a large change in the other.

Front

What is an outlier in a scatterplot?

Back

An outlier is a data point that lies far away from the other points in a scatterplot, which may indicate an unusual observation.

Front

How can you determine the strength of a correlation from a scatterplot?

Back

The strength of a correlation can be determined by how closely the points cluster around the trend line; a tighter cluster indicates a stronger correlation.

Front

What is the difference between positive and negative correlation?

Back

Positive correlation means both variables increase together, while negative correlation means one variable increases as the other decreases.