The business sells categories of products including DVD, CD, and books which include Classical,…

The business sells categories of products including DVD, CD, and books which include Classical, Novel, Politics, and bestsellers. The main challenges in the business are profit, and decreasing sales. As business struggles to survive in the market, you have been hired as an analyst to help the manager to find out the reasons behind the sales decline and profit loss.
Using analytics and application (LAB practices) address the following questions/sections (as guide only). You can come up with any rational question to answer, as long as you can provide your reasoning and assumptions behind that.
1. Z-score: How many standard deviation above or under average ‘Amount’ and ‘Age’ are? Are there any outliers? (choose any numerical variable)
2. Chi-square test: Is there any relationship between ‘type of customer’ and ‘product’ purchased?