Frederick is a business major and is conducting a study to determine the effect of having agendas for project meeting at large companies. He surveyed a randomly selected group of 500 project managers for large companies in Boston, M.A, and found substential evidence of an association between the duration of a project meeting and whether an agenda was followed. Which of the following can Frederick conclude from this information?

Options

A. Use of a meeting agenda causes a decrease in meeting time at large companies in Boston, M.A.
B. Use of a meeting agenda causes a decrease in meeting time at large companies in United States.
C. There is an association between the use of meeting agenda and the duration of meeting agenda and the duration of meeting at large companies in Boston, M.A.
D. There is an association between the use of meeting agenda and the duration of meeting agenda and the duration of meeting at large companies in United States.

Answer

C

Explanation

Difficult: Medium
Category: Problem Solving and Data Analysis/ Statistics and Probability.
Strategic Advice: Skim through the answer choices-each one involves consistency, so you need to examine the stactistic that measures consistency, which is standard deviation.
Getting to the Answer: The mean run times hasve nothing to do ewith coosistency, so eliminated A and B. A lower standard devaition means the data is less spread our and therefore more consistent. Marcelle's standard deviation is the lowest, so he performed the most consistently. This matches (D).