Hey everyone, this is a fun activity to solidify confidence interval concepts. Students pair up and use rubber bands (decently thick ones) to shoot square erasers (something like THIS) down the hall as far as they can. They have to think through randomization in the shooter and independence before they begin. I go out before the day of the acitivity to shoot several erasers and calculate my average so that they have to interact with an average in relation to their confidence interval.

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