A Researcher with the Ministry of Transportation Is Commissioned to Study

question 75

Multiple Choice

A researcher with the Ministry of Transportation is commissioned to study the drive times to work (one-way) for U.S. cities. The underlying hypothesis is that average commute times are different across cities. To test the hypothesis, the researcher randomly selects six people from each of the four cities and records their one-way commute times to work. Refer to the below data on one-way commute times (in minutes) to work. Note that the grand mean is 36.625. The conclusion for the hypothesis test is ________.

• A) to reject the null hypothesis; we cannot conclude that not all mean commute times are equal
• B) do not reject the null hypothesis; we cannot conclude that not all mean commute times are equal
• C) reject the null hypothesis; we can conclude that not all mean commute times are equal
• D) do not reject the null hypothesis; we can conclude that not all mean commute times are equal

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Definitions:

Credit Balance

The amount residing in a financial account that signifies the sum that a financial institution owes to the customer.

Manufacturer

A business entity or individual that makes finished products from raw materials through various processes.

Service Provider

A company or an individual that offers services to others in exchange for payment, typically specializing in a specific area of work.

Perpetual System

An inventory management system that tracks the addition and subtraction of inventory with each sale and purchase in real time, providing a high level of detail and accuracy.