The regional manager of a sales team is trying to justify th

The regional manager of a sales team is trying to justify the paltry increase in sales during a one-day promotion. Of the 17 salespersons, the average total sales was $7,252 (s = $947), compared with a stable company average of $7,139. Faced with the non-significance of this outcome, the manager complains that this is merely a matter of a small sample. If the same numbers had been derived, she argues, from a larger sales team, the results would\'ve been ``abso-freaking-lutely\'\' significant, which you interpret as indicating a level of = .01. The manager\'s claim is true; but in the scenario imagined, what is the minimum size of sales team needed to produce such an outcome?

Solution