Referring to Example 6, but using only the two conditions signature at bottom after filling out the

Question:

Referring to Example 6, but using only the two conditions "signature at bottom" after filling out the form and "no signature required."
(a) Conduct a x2 test. Take or = .05.
(b) Does the conclusion of your test prove that the two probabilities pN and pB are equal? Clearly explain the proper conclusion of your test.