


Chapter 9: Standard Deviation (Advanced) 

Statistical Measurements Image that a politician in your state is up for reelection. Trying to impress the public with the work she has done, the politician announces at a press conference that at the end of her term the average yearly salary per person in the state is $80,000. Would you support her based on that number? It sounds good it sounds like everyone in her state is making $80,000. But can we be sure? A reporter wants to know if her statistic is valid, and he picks three groups of five people randomly from the state. Each group has the same average, $80,000. Let's look at the different groups now.
What can we learn from this chart?
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