52. ERP effectiveness. When implementing a packaged Enterprise Resource Planning (ERP) system, many companies report that the module they first install is Financial Accounting. Among the measures used to gauge the effectiveness of their ERP system implementation is acceleration of the financial close process. Below is a sample of 8 companies that report their average time (in weeks) to financial close before and after the implementation of their ERP system.

a) Identify the procedure you would use to assess the effectiveness of the ERP system and check to see if the conditions allow for the use of that procedure.

b) Test an appropriate hypothesis and state your conclusion.

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Company Before Before After 1 6.5 4.2 2345698 7.0 5.9 8.0 8.0 4.5 4.0 5.2 3.8 4.9 4.1 5.2 6.0 6.5 4.2