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A consumer research firm is hired to determine which brand of laundry soap is most preferred by consumers. After surveying a sample of housewives, they find that the most preferred brand is White Suds. Which of the following is the greatest threat to external validity in this study?
Net Method
An accounting system that records transactions with their net effect, considering any discounts or allowances for prompt payment.
Loan Liability
A financial obligation representing borrowed funds that the borrower is legally required to repay to the creditor, typically with interest.
Foreign Exchange Rate
The rate at which one currency can be exchanged for another, often used in international trade and investment.
Interest
The charge for borrowing money, calculated as a percentage of the amount borrowed.
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