The regional manager of a sales team is trying to justify the paltry increase in

Question

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?

Explanation / Answer

The regional manager of a sales team is trying to justify the paltry increase in

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