Part 9: Scatter Plots and Associations

Front

What is a scatter plot?

Back

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

Front

What does a positive association in a scatter plot indicate?

Back

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

Front

What does a negative association in a scatter plot indicate?

Back

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

Front

What does 'no association' mean in the context of scatter plots?

Back

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

Front

What is the purpose of a linear model in statistics?

Back

A linear model is used to describe the relationship between two variables using a straight line, allowing for predictions based on the data.

Front

What does the slope of a linear equation represent?

Back

The slope represents the rate of change of the dependent variable (y) with respect to the independent variable (x).

Front

What does the y-intercept of a linear equation indicate?

Back

The y-intercept indicates the value of y when x is zero.

Front

What is a two-way table?

Back

A two-way table is a statistical table that displays the frequency distribution of two categorical variables.

Front

What does a strong linear association look like in a scatter plot?

Back

A strong linear association is characterized by data points that are closely clustered around a straight line.

Front

What is the difference between a weak and strong linear association?

Back

A weak linear association has data points that are more spread out from the line, while a strong linear association has points that are closely aligned with the line.