Statistic Homework questions help

timer Asked: Jan 18th, 2015

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1.Individuals filing federal income tax returns prior to March 31 received an average refund of $1056.  Consider the population of "last-minute" filers who mail their tax return during the last five days of the income tax period.

a. A researcher suggests that a reason individuals wait ;until the last five days is that on average these individuals receive lower refunds than do the early filers. Develop appropriate hypotheses such that the rejection of Ho will support the researcher's contention.

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