Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation that displays the relationship between two quantitative variables, using dots to represent data points.

Front

What does a trend line in a scatterplot indicate?

Back

A trend line indicates the general direction or pattern of the data points in a scatterplot, helping to visualize the relationship between the variables.

Front

How can you use a trend line to make predictions?

Back

You can use a trend line to predict values by extending the line and finding the corresponding value on the other axis for a given input.

Front

What does a positive association in a scatterplot mean?

Back

A positive association means that as one variable increases, the other variable also tends to increase.

Front

What does a negative association in a scatterplot mean?

Back

A negative association means that as one variable increases, the other variable tends to decrease.

Front

What does no association mean in a scatterplot?

Back

No association means there is no discernible pattern or relationship between the two variables represented in the scatterplot.

Front

How do you identify the strength of a relationship in a scatterplot?

Back

The strength of a relationship can be identified by how closely the data points cluster around the trend line; tighter clusters indicate a stronger relationship.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess relationships between variables, identify trends, and detect outliers in data.

Front

What is an outlier in a scatterplot?

Back

An outlier is a data point that significantly deviates from the overall pattern of the data, which can affect the interpretation of the relationship.

Front

How can you determine the slope of a trend line?

Back

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