Aresearcher wanting to determine if amount of hours sleeping was related to one s attitude would evaluate the research study using analysis.
a. variable
b. scatterplot
c. correlation
d. regression

Option 'C' is correct.

Step-by-step explanation:

A researcher wanting to determine if amount of hours sleeping was related to one's attitude would evaluate the research study using "Correlation" analysis.

As we know that "Correlation shows the interdependence of variable quantities."

Here, the amount of hours sleeping is dependent on one's attitude.

So, there is mutual connection between the amount of hours sleeping and their attitudes.

Hence, Option 'C' is correct.