Promotional Campaigns The General Manager of a Chain of Fast Food Chicken

question 156

Essay

Promotional Campaigns
The general manager of a chain of fast food chicken restaurants wants to determine how effective their promotional campaigns are.In these campaigns "20% off" coupons are widely distributed.These coupons are only valid for one week.To examine their effectiveness,the executive records the daily gross sales (in $1,000s)in one restaurant during the campaign and during the week after the campaign ends.The data is shown below. ​ ​
-{Promotional Campaigns Narrative} Can they infer at the 5% significance level that sales increase during the campaign?

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