A Researcher with the Ministry of Transportation Is Commissioned to Study

question 85

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 value of the test statistic is ________.

• A) 0.06
• B) 0.40
• C) 2.51
• D) 16.75

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Definitions:

Median

The middle value in a dataset when it is sorted in ascending order, or the average of the two middle values when the set is even.

Even Number

An even number is an integer that is exactly divisible by 2, such as 2, 4, 6, and so on.

Formula

A mathematical relationship or rule expressed in symbols.

Calculating Mean

The process of finding the average value of a set of numbers by adding them all up and dividing by the number of numbers.