Essay
A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the past 30 days,with a tolerable sampling error (E)of 0.03 and a confidence level of 97.5%.If secondary data indicated that 25% of all adults had used the Internet for such a purpose,what is the sample size?
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1)at 97.5% confidence,Z = 2.24...View Answer
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