Use the Following Information to Answer Questions (5) - (7)

question 38

Multiple Choice

Use the following information to answer questions (5) - (7) . A tire manufacturer has made some
modifications to its most popular tire and wants to see if the tread on the modified tire will last
longer than the original tire. Because there is much variation in the way people drive, the
manufacturer decides to use blocking to reduce this variation. Twenty cars will be used to test the
tires. Ten cars are randomly selected to receive an original tire on the right rear wheel and a
modified tire on the left rear wheel. The remaining ten cars will receive an original tire on the left
rear wheel and a modified tire on the right rear wheel. Each car will then be driven 10,000 miles and
the amount of wear recorded for each wheel.
-Which test design would be most appropriate for this scenario?

• A)Two-sample z-test
• B)Paired z-test
• C)Two-sample t-test
• D)Paired t-test

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A portable computing device such as a smartphone or tablet that has wireless internet capabilities.

Designated Leader

An individual who has been officially assigned or chosen to lead and guide a group or team.

Parliamentary Procedure

A set of rules and guidelines used to conduct meetings and make decisions in a fair, orderly, and efficient manner.

Robert's Rules

A set of guidelines for conducting meetings and making decisions in a structured and orderly manner.