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Customer satisfaction is measured on a scale between -2 and 2. The last survey estimated mean...

Customer satisfaction is measured on a scale between -2 and 2. The last survey estimated mean customer satisfaction to be .53 with a known standard deviation of 3.64. Another survey is going to be taken. Given past results, you really need to have a margin of error of .18 in your 95% confidence interval. What is the smallest sample size that will get you this margin of error?

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