- Using the Excel file Sales transaction find the following 15 Marks
a. Identify the levels of measurement for each variables
b. Construct a cross tabulation to find the number of transactions by product and region, total amount of revenue by region, and total revenue by region and product.
c. Calculate the descriptive statistics and infer.
d. Find the average sales by source (web or e-mail). Do you think this information, could be useful in advertising? Explain how and why or why not.
e. Find the proportion of customers who used PayPal and the proportion of customers who used credit cards. Also find the proportion that purchased a book and the proportion that purchased a DVD.
f. Summarize your findings a present a brief report
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