An Inventor Has Developed a New Spray Coating That Is

question 51

Multiple Choice

An inventor has developed a new spray coating that is designed to improve the wear of bicycle tires. To test the new coating, the inventor randomly selects one of the two tires on each of 50
Bicycles to be coated with the new spray. The bicycle is then driven for 100 miles and the amount
Of the depth of the tread left on the two bicycle tires is measured (in millimeters) . It is desired to
Determine whether the new spray coating improves the wear of the bicycle tires. The data and
Summary information is shown below: $\begin{array}{c|c|c}\text { Bicycle } & \text { Coated Tire (C) } & \text { Non-Coated Tire (N) } \\\hline 1 & 1.452 & 0.785 \\2 & 1.634 & 0.844 \\+ & 1 & + \\50 & 1.211 & 0.954\end{array}$



Use the summary data to calculate the test statistic to determine if the new spray coating improves the mean wear of the bicycle tires.

• A) \(z = 34.25\)
• B) \(z = 55.26\)
• C) \(z = 23.02\)
• D) \(z = 62.46\)

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Definitions:

Price Fixing

A conspiracy among firms to set prices for a product.

Ethical

Pertains to the principles of right and wrong that guide an individual in making decisions that affect others. In business, it often refers to practices that are morally right, fair, and honest.

Time Share

A property ownership model where multiple individuals have rights to use the property, each at different times of the year.

Caveat Emptor

A principle in commerce that places the onus on buyers to perform due diligence before making a purchase.