It Was Discovered That a Larger Proportion of Children Who

question 39

Multiple Choice

It was discovered that a larger proportion of children who slept with nightlights later developed nearsightedness, compared to children who did not sleep with nightlights.The headlines read, "Leaving a light on for you children causes nearsightedness!" Later it was pointed out that nearsighted people have more trouble seeing in the dark and are more likely to leave lights on at night for their kids.And those same nearsighted parents are likely to have nearsighted kids.This is an example of ________________________ .

• A)bias
• B)a control group
• C)a placebo
• D)a randomized block design
• E)a lurking variable

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Definitions:

Consumer Incomes

The total amount of income earned by consumers, influencing their purchasing power and demand for goods and services.

Average Product

The output produced, on average, by each unit of a variable input, such as labor.

Labor

Human effort, whether physical or mental, exerted in the production of goods and services.

Car Detailing

A service performed on a vehicle to restore its cleanliness and appearance, both inside and out, often including paint care, interior detailing, and wheel cleaning.