Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation that displays the relationship between two quantitative variables, using points to represent individual data points.

Front

What does a negative correlation indicate in a scatterplot?

Back

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

Front

What does a positive correlation indicate in a scatterplot?

Back

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

Front

What does no correlation mean in the context of a scatterplot?

Back

No correlation means that there is no discernible relationship between the two variables; changes in one variable do not predict changes in the other.

Front

How can you use a trend line in a scatterplot?

Back

A trend line can be used to predict values of one variable based on the values of another variable by showing the general direction of the data.

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatterplot, minimizing the distance between the line and all data points.

Front

What is the purpose of analyzing scatterplots?

Back

The purpose of analyzing scatterplots is to identify relationships, trends, and patterns between two variables.

Front

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

Back

The slope of a trend line indicates the direction and strength of the relationship between the two variables; a positive slope indicates a positive correlation, while a negative slope indicates a negative correlation.

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 overall trend and interpretation of the scatterplot.

Front

What does it mean if a scatterplot shows a linear relationship?

Back

A linear relationship means that the data points can be approximated by a straight line, indicating a consistent relationship between the two variables.