Johnson Is Hired by a Company to See If a New

question 116

Multiple Choice

Johnson is hired by a company to see if a new product, Topocal, will cause hair to grow on the heads of bald men. He recruits one thousand bald men and randomly divides them into two groups: Five hundred men (group A) rub Topocal on their scalps each day; the other five hundred (group B) rub a standard skin lotion on their scalps each day. After two months, Johnson checks to see what the results have been. He finds that there has been hair growth in 7 percent of group A and in 2 percent of group B) Given the size of Johnson's two groups, would you say that the results of the test are statistically significant?

• A)yes
• B)no
• C)no way to tell

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Definitions:

Analyzing Evidence

The systematic examination and evaluation of data or information, often to understand its relevance, validity, or outcomes in a certain context.

Scientific Method

A systematic and logical approach to discovering how things in the universe work, through observation, experimentation, and hypothesis testing.

Brain Chemical

Molecules in the brain, including neurotransmitters, that influence various processes such as mood, thought patterns, and behavior.

Vitamin E

A fat-soluble antioxidant vitamin important for maintaining the health of cells and protecting them from damage.