Making Predictions and Reading 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 the line of best fit represent in a scatterplot?

Back

The line of best fit represents the trend in the data, showing the general direction that the data points follow.

Front

How can you determine the line of best fit?

Back

The line of best fit can be determined by visually inspecting the scatterplot and drawing a line that best represents the data points, or by using statistical methods like linear regression.

Front

What is correlation in the context of scatterplots?

Back

Correlation refers to the 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 (both variables increase together), negative correlation (one variable increases while the other decreases), and no correlation (no apparent relationship).

Front

What does a positive correlation look like on a scatterplot?

Back

A positive correlation appears as an upward slope from left to right, indicating that as one variable increases, the other variable also increases.

Front

What does a negative correlation look like on a scatterplot?

Back

A negative correlation appears as a downward slope from left to right, indicating that as one variable increases, the other variable decreases.

Front

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

Back

The purpose is to estimate the value of one variable based on the value of another variable, using the trend shown in the scatterplot.

Front

How do you interpret a scatterplot with no correlation?

Back

A scatterplot with no correlation shows a random distribution of points, indicating that there is no predictable relationship between the two variables.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations. They can affect the line of best fit and may indicate variability in the data.