Scatterplots-Correlation & Best Fit Lines

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 correlation mean in statistics?

Back

Correlation refers to a statistical relationship between two variables, indicating how one variable may change in relation to another.

Front

What are the types of correlation?

Back

The types of correlation are positive correlation, negative correlation, and no correlation.

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatterplot, showing the trend of the data.

Front

How do you determine if there is no correlation in a scatterplot?

Back

There is no correlation if the points on the scatterplot do not show any discernible pattern or trend.

Front

What does positive correlation indicate?

Back

Positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does negative correlation indicate?

Back

Negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

How can you visually identify a line of best fit on a scatterplot?

Back

You can visually identify a line of best fit by drawing a line that minimizes the distance from all points to the line, capturing the overall trend.

Front

What is the purpose of using a line of best fit?

Back

The purpose of using a line of best fit is to make predictions about one variable based on the value of another variable.

Front

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

Back

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