1. The marketing department of a firm in New York City is curious to see which group of U.S. high school students, from the 9th, 10th, 11th, or 12th grades, spends the most time watching television each day. After selecting 25 students randomly, they find that 9th graders watch the most television per day.
Part A: What is the population?
Part B: What is the sample of the population?
Part C: Discuss collaboratively with YOUR PARTNER: Explain the difference between population and sample.
2. Could the following experiments be used to simulate an event in which the probability of success, P(success), is 0.25 and the number of successes out of 10 events is desired? Explain your answers with the help of YOUR PARTNER.
Part A: Use a random number table, with digits 1 and 2 representing successful and the remaining digits representing unsuccessful. Choose 10 digits, one for each event.
Part B: Roll a die. Let 5 and 6 represent successful and the other values indicate unsuccessful. Roll the die 10 times, once for each event.
Part C: Use a spinner that is divided into four equal parts. Let one color represent successful; the other three colors represent unsuccessful. Spin the spinner 10 times, once for each event.
3. An experimental study is one method of performing an experiment during which data may be generated and analyzed for statistical purposes.
Part A: What are the six steps necessary to conduct an effective experimental study?
Part B: Does an experimental study have a control? Explain with the help of YOUR PARTNER.
Part C: Discuss collaboratively: Can an experimental study prove causation? Explain with the help of YOUR PARTNER.