Dean, Dixon, Jones, and Baxter Unit 3 Vocabulary

Front

What happens to the variables in a positive association?

Back

Both increase; the graph appears to move upward from left to right.

Front

What is a statistical investigative question?

Back

A question that can be answered with data.

Front

What is a nonlinear association?

Back

A graph that is not a straight line.

Front

What does the slope of a line represent?

Back

How steep the line is; rise over run.

Front

What describes a negative association?

Back

One variable increases, the other decreases; the graph appears to move downward negatively from left to right.

Front

What is a variable in statistics?

Back

A characteristic or attribute that can take on different values.

Front

What is the purpose of a scatter plot?

Back

To show the relationship between two quantitative variables.

Front

What does it mean if two variables are correlated?

Back

There is a statistical relationship between the two variables.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship, while causation indicates that one variable directly affects another.

Front

What is a trend line?

Back

A line that shows the general direction of data points in a scatter plot.