The Following Data Show the Test Scores of Six Individuals

question 19

Essay

The following data show the test scores of six individuals on a standardized test before and after attending a preparation seminar for the test. ​
Use the Wilcoxon signed-rank test in order to determine whether or nor the seminar has been effective. Hint: This is a one tailed test. Let α = .05.

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Definitions:

Purchases Returns And Allowances

From the buyer’s perspective, returned merchandise or an adjustment for defective merchandise.

Periodic Inventory System

An inventory valuation method where inventory and cost of goods sold are determined at set periods, not after each transaction.

Price Adjustments

Changes made to the selling price of goods or services in response to market conditions, cost changes, or errors in the original pricing.

Single-step Income Statement

A simplified form of income statement that calculates net income by subtracting total expenses directly from total revenues without categorization.