Question: I've been given this assignment: Problem: You have been assigned to determine whether more people prefer Coke or Pepsi. Assume that roughly half the population

I've been given this assignment: Problem: You have been assigned to determine whether more people prefer Coke or Pepsi. Assume that roughly half the population prefers Coke and half prefers Pepsi. How large a sample do you need to take to ensure that you can estimate, with 90% confidence, the proportion of people preferring Coke to within 5% of the actual value? Show all of your work.

How do I know what the population is and what do I do next?

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