Question: AARP reported on a study conducted to learn how long it takes individuals to prepare their federal income tax return (AARP Bulletin, April 2008). The
AARP reported on a study conducted to learn how long it takes individuals to prepare their federal income tax return (AARP
Bulletin, April 2008). The data
contained in the Microsoft Excel
Online file below are consistent with the study results. These data provide the time in hours required for a samble of 40 individuals to complete their federal income tax returns. Assume that the population standard deviation is
known to be o = 11 hours.
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