4. According to a recent report, 40% of high school students participate in some kind of music program, such as band or choir. A music educator questions this claim. She surveys a random sample of 1,250 high school students and finds that 28% of the students in the sample report participating in a music program. The sample proportion is therefore equal to A. 0.02. B. 0.40. C. 0.28. D. 0.35. E. 0.51.

On a particular night, a baseball stadium sells 60% of its seats, and of those, 15% do not end up showing up to the game.  Assuming everyone present is sitting in a seat, what percentage of seats in the stadium are empty?

2. A study for adverse reactions assigned adults at random to one of two common pain relievers (ibuprofen and acetaminophen). It was found that out of 733 adults who were administered ibuprofen, 103 of them experienced an adverse reaction, and out of 732 adults who were administered acetaminophen, 85 of them experienced an adverse reaction. Let p1 denote the proportion of adults who experience an adverse reaction when taking ibuprofen and let p2 denote the proportion of adults who experience an adverse reaction when taking acetaminophen. Suppose we want to answer the following questions. i) Test, at the 3% level of significance, whether the proportion of adults who experience an adverse reaction when taking ibuprofen is greater than the proportion of adults who experience an adverse reaction when taking acetaminophen. ii) Calculate the 97% confidence interval for p1 - P2. The table below provides the information needed to perform the hypothesis test: Value x1 103.0000 85.0000 733.0000…

From the given scenario, define the population proportion. In 2019, a national survey organization asked the question "Do you go on more than two vacations per year?" to a random sample of 2,000 Americans. 580 responded "Yes", while the other 1,420 people responded "No".   Group of answer choices:   A) the proportions of the sampled Americans who go on more than two vacations per year   B) the proportion of all Americans who go on more than two vacations per year   C) the 1,420 people who responded "No"   D) the 2,000 Americans