9.1 Scatter Plot & 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 axis.

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

How can you identify a strong positive association in a scatter plot?

Back

A strong positive association is identified when the data points closely follow a straight line that slopes upwards.

Front

How can you identify a strong negative association in a scatter plot?

Back

A strong negative association is identified when the data points closely follow a straight line that slopes downwards.

Front

What is the difference between weak and strong associations in scatter plots?

Back

Weak associations have data points that are more spread out and do not closely follow a line, while strong associations have data points that closely follow a line.

Front

What is an example of a positive association?

Back

An example of a positive association is the relationship between the number of hours studied and test scores; generally, more study hours lead to higher scores.

Front

What is an example of a negative association?

Back

An example of a negative association is the relationship between the temperature of a drink and the number of ice cubes; as the temperature increases, the number of ice cubes decreases.

Front

What is an example of no association?

Back

An example of no association is the relationship between the number of letters in a person's name and the last digit of their phone number.