Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

Front

What does the 'Line of Best Fit' represent in a scatterplot?

Back

The 'Line of Best Fit' is a straight line that best represents the data on a scatterplot, showing the general direction of the data points.

Front

What does a positive correlation in a scatterplot indicate?

Back

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

Front

What does a negative correlation in a scatterplot indicate?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What are outliers in a scatterplot?

Back

Outliers are data points that are significantly different from other observations in the dataset, often lying far away from the 'Line of Best Fit'.

Front

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

Back

The strength of a correlation can be determined by how closely the data points cluster around the 'Line of Best Fit'; closer points indicate a stronger correlation.

Front

What does it mean if a scatterplot has no correlation?

Back

No correlation means that there is no apparent relationship between the two variables; the data points are scattered randomly.

Front

What is the purpose of using a scatterplot?

Back

Scatterplots are used to visually assess the relationship between two quantitative variables and to identify trends, correlations, or outliers.

Front

What is the difference between a strong and weak correlation?

Back

A strong correlation means the data points are closely aligned with the 'Line of Best Fit', while a weak correlation means the points are more spread out.

Front

How do you identify a line of best fit on a scatterplot?

Back

A line of best fit can be identified by drawing a straight line that minimizes the distance between the line and all the data points.