Case Study: Polls
Learn to connect real-world polls with statistical inference by examining sampling concepts such as population parameters, sample size, randomness, and unbiasedness. This lesson uses a 2013 Obama approval poll example to illustrate how polling data can help infer about a broader population, emphasizing the necessity of random sampling for valid conclusions.
We'll cover the following...
We'll cover the following...
Let’s now switch gears to a more realistic sampling scenario than our bowl activity—a poll. In practice, pollsters don’t take 1,000 repeated samples, but rather take only a single ...