Question

The first picture contains the whole math problem. I went ahead and took additional pictures of each problem I need answers for marked by a red X. For d, there’s a drop down for one of the part so please choose the correct answer. THANKS IN ADVANCE!!!

Individuals fling federal income tax returns prior to March 31 received an average refund of $1,079. Consider the population of "last-minute" filers who mail their tax return during the last five days of the income tax period (typically April 10 to April 15) a. A researcher suggests that a reason individuals wait until the last five days is that on averaoe these individuals receive lower refunds than do early filers. Develop appropriate hypotheses such that rejection of Ho will support the researchers contention. He : μ is greater than or equal to 1,079 H. : μ¡s(less than 1,079 b. For a sample of 400 individuals who fled a tax return between April 10 and 15, the sample mean refund was $930, Based on prior experience a population standard deviation of σ-$1,800 may be assumed, what is the p-value (to 4 decimals)? c. Using a 0.05, can you conclude that the population mean refund for Tast minute Slers is less than the populati on mean refund for early filers? Answer the next three questions using the critical value approach d. Using a - 0.05 nhat is the critical value for the test statistic? Enter nepative value as necative number State the rejection rule: Reject α-0.05 if is. . Select you,answer Using α 0. 05, can you condude that the population mean refund for the critical value. last minute f lers is less than the population mean refund for ear y f ers?

Answer 1