Answer is not D

A group of managers, whose members work closely together, need to estimate the size of the market for a new product. An average of their individual estimates is to be used in the decision making process. Which of the following statements isnottrue, according to research:

Select one:

a.more than five managers should be in the group to obtain an average that is a reliable estimate

b.it is likely that little will be gained with a weighted average of the individual managers' estimates

c.doubling the size of the group is unlikely to double the accuracy

d.the accuracy of the average will improve with a larger group