3. A study compared the effects of four 1-month point-of-purchase promotions on sales. The unit sales for
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3. A study compared the effects of four 1-month point-of-purchase promotions on sales. The unit sales for five stores using all four promotions in different months follow.
Free Sample 78 87 81 89 85
On-pack gift 94 91 87 90 88
Cents off 73 78 69 83 76
Refund by mail 79 83 78 69 81
At the 0.01 level of significance, do the promotions produce different effects on sales?
Related Book For
Stats Data and Models
ISBN: 978-0321986498
4th edition
Authors: Richard D. De Veaux, Paul D. Velleman, David E. Bock
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