Question 1 Advertising budget is a company's allocation of promotional expenditures over a specified period. A business analyst selected a random sample of 9 companies in 2023 in Toronto who sold similar IT equipment and recorded their yearly advertising budget (in millions of dollars).

Company A	Company B	Company C	Company D	Company E	Company F	Company G	Company H	Company I
$11 (Million)	$18 (Million)	$38 (Million)	$15 (Million)	$12 (Million)	$22 (Million)	$13 (Million)	$13 (Million)	$19 (Million)

1. Define population, variable, and experimental unit.
2. Calculate mean, median, and standard deviation of the yearly advertising budget of the sampled companies.
3. Calculate and interpret the z-score for the advertising budget 38 million dollars. Is the budget unusual? Justify.
4. Draw a box plot manually for the sampled yearly advertising budget with appropriate labels forQ1, Q2, Q3, upper limit, lower limit, upper whisker, and lower whisker and include in your answer. Is there any advertising budget considered outlier? Identify the outlier and justify your answer.
5. What is the shape of the data? Which measure of central tendency (mean or median) would you suggest for summarizing the yearly advertising budget of the sampled companies and why?
6. Calculate and interpret
   

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