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Thinking about Randomness Randomness (and probability) is one of the more difficult things to understand. In this course we do not go into nearly the detail that most statistics courses go into on randomness. Instead, we are going to try to get across a few main points. The point we want to get across here [...]
A recent headline: Here’s how the ACS is implemented (from Wikipedia): The ACS has an initial sample of approximately 3 million housing unit addresses and group quarters in the United States, with sample selected from all counties and county-equivalents, American Indian and Alaska Native area, and Hawaiian Homeland, and in Puerto Rico annually. Data are collected primarily by mail, with follow-ups by [...]
Three things it tells me: 1. The vast majority of alcohol consumers have had at least one hangover. 2. Less than half of students have weekly hangovers. 3. I think that the second and third bars are exclusive and of a common whole, which means that 40% of college students have at least one hangover [...]