A clinical trial is conducted to test a new eye treatment, interferon-a, on its efficacy to slow down age-related vision loss. The currently used medicine is found to be effective on 30 percent of all the patients. Scientists believe that interferon-a could have better performance than that. In other words, scientists believe interferon-a will be effective on a larger percentage of patients than the current treatment, and they are able to differentiate between a medicine being "effective" and "not effective."

Oliver takes a random sample of beads and finds that 19 out of the 50 beads sampled are purple. What is the p-value associated with the hypothesis test from Question 4?