According to Keynote Systems, Wal-Marts website was available 95% of the time during a holiday shopping season.
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According to Keynote Systems, Wal-Mart’s website was available 95% of the time during a holiday shopping season. Assuming this finding to be based on a simple random sample of 200 attempts, construct and interpret the 90% confidence interval for the population proportion of the time the Wal-Mart site was available during this period.
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