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A restaurant located in an office building decides to adopt a new strategy for attracting customers to the restaurant. Every week it advertises in the city newspaper. To measure how well the advertising is working, the restaurant owner recorded the weekly gross sales for the 15 weeks after the campaign began and the weekly gross sales for the 15 weeks immediately prior to the campaign. Data on weekly gross sales (in dollars) for 15 weeks before and after the program were recorded and analyzed. Below are the outputs.
Paired Samples StatisticsMean
N
Std. Deviation
Std. Error Mean
Pair 1
before
5392.13
15
398.035
102.772
after
5746.06
409.010
105.605
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