Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E. that corresponds to a sample of size 80 with 57.5% successes at a confidence level of 99%. M.E. = % Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Round final answer to one decimal place
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Using a standard normal distribution table or a calculator, we find that z* is approximately 2.576. Show more…
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