The owner of a retail store randomly selected the following weekly data on profits and advertising cost. 
a.Write down the appropriate linear relationship between advertising cost and profits. Which is the dependent variable? Which is the independent variable?
b.Calculate the least squares estimated regression line.
c.Predict the profits for a week when $200 is spent on advertising.
d.At 95% confidence, test to determine if the relationship between advertising costs and profits is statistically significant.
e.Calculate the coefficient of determination.
Definitions:
Country of Origin
The country where a product has been manufactured or produced, often influencing consumer perceptions and purchasing decisions.
Purchaser Choice
The decision made by consumers regarding which products or services to buy among available options.
Market Belief
An assumption or conviction held by consumers or market participants about the market or specific aspects of the market, influencing their behaviors and decisions.
Zipf's Law
A statistical distribution principle stating that in a given dataset, the frequency of any item is inversely proportional to its rank in the frequency table.
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