Johnson Is Hired by a Company to See If a New

question 49

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.What if Johnson had started with 2,000 bald men (1,000 in each group) and got the same 7 and 2 percent figures? Would this have made any difference for the significance of Johnson's results?

• A)Yes: It changes them from insignificant to significant.
• B)Yes: It changes them from significant to insignificant.
• C)No: They were insignificant before, and this leaves them that way.
• D)No: They were significant before, and this leaves them that way.

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Definitions:

Specification Methods

Techniques used to describe the requirements, standards, and quality measures for materials, products, or services.

Purchasing by Specification

Involves acquiring goods or services based on detailed descriptions of their requirements and characteristics, ensuring they meet specified standards and performance criteria.

Supplier Expertise

The specialized knowledge or skills held by a supplier, making them a preferred choice for delivering specific goods or services.

Traditional Criteria

Established or long-standing principles and standards used to make decisions, evaluate performance, or define quality in various fields.