Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive correlation indicate in a scatterplot?

Back

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

Front

What does a negative correlation indicate in a scatterplot?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What does no correlation mean in a scatterplot?

Back

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

Front

How can you identify an outlier in a scatterplot?

Back

An outlier is a data point that is significantly different from the other points in the scatterplot, often appearing far away from the cluster of points.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure of the strength and direction of a relationship between two variables, ranging from -1 to 1.

Front

What type of correlation is represented by the scatterplot of temperature and ice cream sales?

Back

Positive correlation.

Front

What type of correlation is represented by the scatterplot of study time and test scores?

Back

Positive correlation.

Front

What type of correlation is represented by the scatterplot of hours spent watching TV and grades?

Back

Negative correlation.

Front

What does a linear relationship in a scatterplot look like?

Back

A linear relationship appears as a straight line, indicating a consistent rate of change between the two variables.