ference between two proportions. Find the sample size needed for a margin of ror of 0.2 if you do not have good guess at the values of the two proportions. The mallest sample size would be ppose new information has come in and now you can say that a good guess for p 0.65 and på is 0.35. What would be the smallest sample size in this case? (We will Il bave a margin of error of 0.2). The smallest sample size would be

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