Question: A federal bank examiner is interested in estimating the mean outstanding defaulted loans balance of all defaulted loans over the last three years. A random sample of 20 defaulted loans yielded a mean of $67,918 with a standard deviation of $16,552.40. Calculate a 90% confidence interval for the mean balance of defaulted loans over the past three years.

1. [66,487 69,349]
2. [39,299 96,537]
3. [57,329 78,507]
4. [61,829 74,007]
5. [61,519 74,317]

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