A Confidence Interval for A Population Proportion · Example 3
A financial officer for a company wants to estimate the percent of accounts receivable that are more than 30 days overdue. They survey 500 accounts and find that 300 are more than 30 days overdue. Compute a 90% confidence interval for the true percent of accounts receivable that are more than 30 days overdue, and interpret the confidence interval.
OpenStax, Introductory Business Statistics 2e · §8.3 A Confidence Interval for A Population Proportion · Example 3
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