Which of the Following Threats to Internal Validity Would Be

question 78

Multiple Choice

Which of the following threats to internal validity would be of concern if an outbreak of salmonella in peanut butter occurred while a study was being conducted on perceptions of peanut butter?

• A)maturation
• B)regression to the mean
• C)history
• D)placebo

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Definitions:

Estimation Uncertainty

The degree of approximation involved in certain accounting estimates, which may affect the financial statements.

Income Statement

A financial statement that shows a company's revenues, expenses, and profit over a specific period.

Revenue and Expense Accounts

Accounts used in accounting to track the income generated and expenses incurred by a business, integral to determining net profit or loss.

Income Summary

An account in accounting used to gather all revenue and expenses for a period to calculate net income (or loss).