A Study Is Examining the Effect of a New Antilipemic

question 4

Multiple Choice

A study is examining the effect of a new antilipemic drug, compared with placebo, on lipoprotein levels in postmenopausal women. Which of these actions represents the researcher's attempt at constancy in data collection to control extraneous variables?

• A) Drawing the serum lipoprotein levels of all subjects at the same time of day
• B) Having the same phlebotomist draw serum lipoprotein levels of all subjects
• C) Using the same room for drawing blood for lipoprotein levels of all subjects
• D) Ensuring that all subjects are postmenopausal women taking lipid-lowering medication

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Definitions:

Same Tastes

A theoretical condition where all consumers have identical preferences, simplifying analysis of market behavior and product demand.

Pay Schedule

A structured timeline for payment to employees that includes frequency and amount.

Before-Tax Wages

The amount of money earned by employees before any taxes are deducted.

Government Payment

Financial transfers made by the government to individuals, firms, or other entities, typically aimed at achieving economic or policy objectives.