Questions 4 and 5

# 4: In clinical trials of a medication, 2175 subjects were divided into two groups. The 1580 subjects in group 1 received the medication. The 595 in group 2 received a placebo. Of the 1580 subjects in group 1, 69 experienced dizziness as a side effect. In group 2, 14 experienced dizziness as a side effect. To test whether the proportion experiencing dizziness in group 1 is greater than that in group 2, the researchers entered the data into statistical software and obtained the following results. Test at a = 0.1. Use example 5 and 6 (show steps (a) - (e) a. Hypothesis: b est Statistics C. P-value: d. Conclusion: e. 95% confidential interval for P, - P2: #5 In 2003, an organization surveyed 1,510 adult Americans and asked about a certain war, "Do you believe the United States made the right or wrong decision to use military force?" Of the 1,510 adult Americans surveyed, 1,090 stated the United States made the right decision. In 2008, the organization asked the same question of 1,510 adult Americans and found that 570 believed the United States made th right decision. Is there an evidence to show that the opinion changed? Use example 5 and 6 (show step (a) - (e). Test at a = 0.05 a. Hypothesis: b. Sample Test Statistics C. P-value: d. Conclusion: e. 95% confidential interval for P1 - P2