The Big Picture of Statistics¹ The process of statistics starts when we identify what group we want to study or learn something about. We call this group the population. Note that the word “population” here (and in the entire course) is not just used to refer to people; it is used in the broader statistical sense, where population can refer not only to people, but also to animals, things etc. For example, we might be interested in:
- the opinions of the population of U.S. adults about the death penalty; or
- how the population of mice react to a certain chemical; or
- the average price of the population of all one-bedroom apartments in a certain city.
- Producing Data or Sampling: A (representative) sample of 1,082 customers was chosen, and each customer was how many stars (up to 5) they would give the product.
- Descriptive Statistics: The collected data were summarized, and it was found that 65% of the sampled customers gave the product 4 stars.