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 on the graph represents an observation.

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 do the same in a consistent manner, forming a straight line when graphed.

Front

How can you identify a positive correlation in a scatterplot?

Back

A positive correlation is identified when the points on the scatterplot tend to rise 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 points on the scatterplot tend to fall from left to right, indicating that as one variable increases, the other variable decreases.

Front

What does it mean if a scatterplot shows no correlation?

Back

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

Front

What is the purpose of using scatterplots in data analysis?

Back

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

Front

What is the best way to predict values using a scatterplot?

Back

The best way to predict values is to look for trends in the data points and use the line of best fit to estimate values for unmeasured data.

Front

What does the slope of a line in a scatterplot represent?

Back

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

Front

How can outliers affect the interpretation of a scatterplot?

Back

Outliers can skew the results and may lead to incorrect conclusions about the relationship between the variables.

Front

What is the significance of the x-axis and y-axis in a scatterplot?

Back

The x-axis typically represents the independent variable, while the y-axis represents the dependent variable.