4. Suppose you own a pizza restaurant and have been in prison for three years. You've just been released to find out that your restaurant has poor reviews. Explain the statistical process control methods you'll use to increase quality. Provide an example chart.

Compare and contrast an observational study and experiment. Define the terms "treatment group" and "placebo group" as part of your answer. Also give an example of each.

3. Recent research suggests that American teenagers spend too much time on extracurricular activities. Mrs. Del Cueto, the principal of the local high school, decides to take a sample of students from her school to find out the number extracurricular activities in which they are involved. Using the data presented below, provide the N, mean, median, and the mode. 0, 0, 0, 0, 0, 1, 1, 2, 2, 2, 3, 3, 4, 4, 4, 4

What is the role and importance of statistical thinking?