Unit 8: Scatterplots and Associations

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

Front

What does a positive linear association in a scatterplot indicate?

Back

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

Front

What does it mean if a scatterplot shows no relationship?

Back

It means that there is no discernible pattern or correlation between the two variables being plotted.

Front

How can you determine the line of best fit in a scatterplot?

Back

The line of best fit is determined by finding a line that best represents the data points, minimizing the distance between the points and the line.

Front

What is the purpose of the line of best fit?

Back

The line of best fit helps to summarize the relationship between the variables and can be used for making predictions.

Front

What is the significance of the slope of the line of best fit?

Back

The slope indicates the rate of change between the two variables; a positive slope indicates a positive relationship, while a negative slope indicates a negative relationship.

Front

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

Back

A strong correlation means that the data points are closely clustered around the line of best fit, indicating a strong relationship between the variables.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation implies that one variable directly affects the other.

Front

How can you interpret the y-intercept of the line of best fit?

Back

The y-intercept represents the expected value of the dependent variable when the independent variable is zero.

Front

What is an outlier in a scatterplot?

Back

An outlier is a data point that lies significantly outside the range of the other data points, which can affect the line of best fit.