A Researcher with the Ministry of Transportation Is Commissioned to Study

question 18

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. Based on the sample standard deviation, the one-way ANOVA assumption that is likely not met is ________.

• A) the populations are normally distributed.
• B) the population standard deviations are assumed to be equal.
• C) the samples are independent.
• D) None of these choices is correct.

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Definitions:

Psychological

relates to the mind or mental processes, especially in connection to behaviors and emotions.

Mental

Mental pertains to the mind and its processes, including thinking, feeling, and perception.

Physical

Refers to the aspects of things that are tangible and perceptible through senses.

Physiological Effect

The impact of various factors on the physical functions of an organism, often referring to the body's responses to external stimuli.