A Company Using a Centralized Database Approach to Data Management

question 2

Multiple Choice

A company using a centralized database approach to data management might not maintain a relational table for ACCOUNTS PAYABLE. Rather, accounts payable balances at any point in time could be computed as the difference between the relations for which of the following continuous events?

• A) PURCHASE_ORDERS and INVENTORY_RECEIPTS
• B) INVENTORY and INVENTORY_RECEIPTS
• C) VALID_ INVOICES and INVENTORY_RECEIPTS
• D) VALID_ INVOICES and CASH_DISBURSEMENTS

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Definitions:

Sample Means

Refers to the average values computed from multiple samples from a population, usually to estimate the population mean.

Pooled Variance

combines the variances of two or more groups, assuming they have the same underlying variance, to estimate a common variance.

Common Variance

The variance shared by two or more variables, often used in the analysis of variance.

Weighted Average

An average that accounts for the different weights or importance of certain factors or quantities in the dataset.