The following are the ratings (0 to 4) given by 12 individuals for two possible new flavors of soft drinks. 
Wilcoxon rank-sum is to be used. What is the z-test statistic?
Definitions:
Receivables Turnover Ratio
A financial metric used to measure how efficiently a company collects cash from its credit sales by dividing net credit sales by average accounts receivable.
Credit Sales
Sales made by a business that allow the buyer to pay at a later date, typically recorded as accounts receivable.
Cost Of Goods Sold
The direct costs attributable to the production of the goods sold by a company, including material and labor expenses.
Liquidity Ratio
A financial metric used to determine how quickly a company can pay off its short-term liabilities with its liquid assets.
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