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 a strong association in a scatterplot indicate?

Back

A strong association indicates that as one variable increases or decreases, the other variable tends to also increase or decrease in a predictable manner.

Front

What is a trend line in a scatterplot?

Back

A trend line is a straight or curved line that represents the general direction of the data points in a scatterplot.

Front

How can you identify a linear relationship in a scatterplot?

Back

A linear relationship can be identified if the data points form a pattern that can be approximated by a straight line.

Front

What is a non-linear relationship in a scatterplot?

Back

A non-linear relationship occurs when the data points do not follow a straight line pattern, indicating a more complex relationship between the variables.

Front

What does it mean if a scatterplot has a positive correlation?

Back

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

Front

What does it mean if a scatterplot has a negative correlation?

Back

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

Front

What is the purpose of using scatterplots in data analysis?

Back

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

Front

What are outliers in a scatterplot?

Back

Outliers are data points that fall far away from the other points in the scatterplot, indicating they may not fit the general trend.

Front

How do you interpret the slope of a trend line in a scatterplot?

Back

The slope of a trend line indicates the rate of change between the two variables; a steeper slope indicates a stronger relationship.