PRP (platelet-rich plasma) therapy is used to treat chronic joint pain and tendon injuries, using plasma derived from the blood of a patient. A study involving 245 patients with lateral epicondylar tendinopathy (tennis elbow) reported that after receiving a PRP injection, 210 patients experienced at least a 25% reduction in pain. Is there evidence that the PRP treatment relieves pain in more than 80% of patients with tennis elbow?

1. Perform the hypothesis test and find the p-value