A Researcher Wants to Compare the Effect of a New

question 605

Multiple Choice

A researcher wants to compare the effect of a new type of shampoo on hair condition. The
Researcher believes that men and women may react to the shampoo differently. Additionally, the
Researcher believes that the shampoo will react differently on hair that is dyed. The subjects are
Split into four groups: men who dye their hair; men who do not dye their hair; women who dye
Their hair; women who do not dye their hair. Subjects in each group are randomly assigned to the
New shampoo and the old shampoo. This experiment

• A) has three factors (shampoo type, gender, whether hair is dyed).
• B) has two factors (gender and whether hair is dyed) blocked by shampoo type.
• C) is completely randomized.
• D) has two factors (shampoo type and whether hair is dyed) blocked by gender
• E) has one factor (shampoo type), blocked by gender and whether hair is dyed.

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Definitions:

Valois Dynasty

A royal dynasty of France that ruled from 1328 to 1589, known for its involvement in the Hundred Years' War and the Wars of Religion.

Catherine de'Medici

A prominent figure in French history, she was queen consort of France from 1547 to 1559 and played a significant role in the political and religious conflict of her times.

Mercenaries

Individuals or groups hired to fight in an armed conflict but are not part of the regular army or fighting forces of a country.

Thirty Years' War

A devastating and complex conflict in Central Europe between 1618 and 1648, involving many European states, marked by a struggle between Catholic and Protestant territories and resulting in significant territorial and power shifts.