Calculating the degree to which two variables are related wi

Calculating the degree to which two variables are related, with a correlation, requires that those variables are measured:

on a scale.

using a ratio scale.

as nominal variables.

as ordinal variables.

Solution

Correlation is used to measure the level of linear relationship between two continuous variables.

And the \"Ratio scale\" gives us the data for continuous variables.

Where as \"nominal\" and \"ordinal\" variables are categorical. They do not take continuous or decimal values.

Hence, \"ratio scale\" should be used.