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 grid.

Front

What does a linear relationship in a scatterplot indicate?

Back

A linear relationship indicates that as one variable increases or decreases, the other variable tends to increase or decrease in a consistent manner, forming a straight line when graphed.

Front

What does it mean if a scatterplot does NOT suggest a linear relationship?

Back

It means that the data points do not form a straight line and may show a more complex relationship, such as a curve or no correlation at all.

Front

How can you identify a positive correlation in a scatterplot?

Back

A positive correlation is identified when the data points slope upwards from left to right, indicating that as one variable increases, the other variable also increases.

Front

How can you identify a negative correlation in a scatterplot?

Back

A negative correlation is identified when the data points slope downwards from left to right, indicating that as one variable increases, the other variable decreases.

Front

What is the purpose of using scatterplots in data analysis?

Back

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

Front

What does it mean if a scatterplot shows no correlation?

Back

No correlation means that there is no discernible pattern or relationship between the two variables, and the data points are scattered randomly.

Front

What is an outlier in a scatterplot?

Back

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

Front

How can scatterplots be used to make predictions?

Back

Scatterplots can be used to make predictions by analyzing the trend of the data points and estimating the value of one variable based on the value of another.

Front

What is the significance of the line of best fit in a scatterplot?

Back

The line of best fit is a straight line that best represents the data points in a scatterplot, helping to summarize the relationship between the variables.