Mathematics, 21.04.2020 15:28 dai77
Individuals filing federal income tax returns prior to March 31 had an average refund of $1102. Consider the population of "last-minute" filers who mail their returns during the last five days of the income tax period (typically April 10 to April 15).
a. A researcher suggests that one of the reasons that individuals wait until the last five days to file their returns is that on average those individuals have a lower refund than early filers. Develop appropriate hypotheses such that rejection of H0 will support the researcher’s contention.
b. For a sample of 600 individuals who filed a return between April 10 and April 15, the sample mean refund was $1050 and the standard deviation was $500. Compute the p-value.
c. Using α =.05, what is your conclusion?
d. Test the hypotheses using the critical value approach (α = 0.025).
Answers: 2
Mathematics, 21.06.2019 19:10
Which ordered pair is a solution of the equation? y + 5 = 2(2+1) choose 1 answer ® only (5,10 ® only (-1,-5) © both (5, 10) and (-1,-5) 0 neither
Answers: 1
Mathematics, 22.06.2019 07:20
Mathematics viiwhat is the coefficient of a variable that appears by itself, like "a"?
Answers: 1
Mathematics, 22.06.2019 08:30
Which best describes the transformation that occurs from the graph of f(x) = x2 to g(x) = (x - 2)2 + 3? 10+ g(x) right 2, up 3 left 2, down 3 right 2, down 3 left 2, up 3
Answers: 1
Individuals filing federal income tax returns prior to March 31 had an average refund of $1102. Cons...
Chemistry, 16.10.2019 20:00
Chemistry, 16.10.2019 20:00