Historical data showed that 18% of Regional Hospital's patient reported a negative experience with the overall care quality. The new management team of the hospital has set a goal to reduce the proportion of patients with negative experience to less than half of the historical value. In a recent survey, 300 random patients out of 15,000 were selected and 20 reported a negative experience. Does this result show that the hospital has achieved its goal?

Part A: What is the appropriate tool for this analysis and why? Be as specific as possible.

Part B: Specify the null and alternative hypotheses.

Part C: What is the conclusion at 5% significance level?

Part D: Provide a brief interpretation of the result (i.e., what the result means in the context of the problem).