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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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jldobro jldobro
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6 years ago
A grocery store has an average sales of 8000 per day. The store introduced several advertising campaigns in order to increase sales. To determine whether or not the advertising campaigns have been effective in increasing sales, a sample of 64 days of sales was selected. It was found that the average was 8300 per day. From past information, it is known that the standard deviation of the population is 1200 . The correct null hypothesis for this problem is
 a.  < 8000.
  b.   8300.
  c.  = 8000.
  d.  > 8300.
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ccoppccopp
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jldobro Author
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6 years ago
this is exactly what I needed
jamesbove
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Yesterday
Thanks for your help!!
alpheratz
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2 hours ago
Thanks
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