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A study is conducted to learn how long it takes the typical taxpayer to complete their federal income tax return. A random sample of 17

A study is conducted to learn how long it takes the typical taxpayer to complete their federal income tax return. A random sample of 17 income tax filers showed a mean time (in hours) of 7.8 and a standard deviation of 2.3. Find a 95% confidence interval for the true mean time required to complete a federal income tax return. Assume the time to complete the return is normally distributed.

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