[All Steps] A random sample of 78 shoppers showed that they spend an average of $46.26 per visit at the bookstore. The standard deviation of the sample
Question: A random sample of 78 shoppers showed that they spend an average of $46.26 per visit at the bookstore. The standard deviation of the sample was $7.85. Find the 99% confidence interval of the true mean. Interpret this confidence interval within the context of the problem.
Deliverable: Word Document 
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[Solution] A manufacturer’s cost is C(q)=(1)/(10)q^2+4q+500 dollars
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