On the math test, Samantha missed 4 of the 20 questions. What is the relative frequency of correct responses?

A. 0.2
B. 0.8
C. 0.4
D. 0.16

To find the relative frequency of correct responses, we need to calculate the number of questions Samantha answered correctly.

She missed 4 out of 20 questions, so she answered 20 - 4 = 16 questions correctly.

The relative frequency of correct responses is the number of correct responses divided by the total number of questions, which is 16/20 = 0.8.

Therefore, the answer is B. 0.8.