A Company That Produces Financial Accounting Software Wants to Offer

Multiple Choice

A company that produces financial accounting software wants to offer better training to its customers. The training is intended to decrease the amount of time required to do complicated accounting calculations. For seven individuals, the amount of time (in minutes) to complete a complicated calculation is determined before and after completing the new training. For the Wilcoxon signed-rank test for the matched-pairs sample, the competing hypotheses are ________.

A) H₀: m_D ≤ 0; H_A: m_D > 0
B) H₀: m_D = 0; H_A: m_D ≠ 0
C) H₀: m_D ≠ 0; H_A: m_D = 0
D) H₀: m_D ≥ 0; H_A: m_D < 0