Preliminary Data Analyses Indicate That You Can Reasonably Use Nonpooled

question 73

Essay

Preliminary data analyses indicate that you can reasonably use nonpooled t-procedures on the given data. Apply anonpooled t-test to perform the required hypothesis test, using either the critical-value approach or the P-value approachas indicated.
-A researcher was interested in comparing the response times of two different cab companies. Companies A and B were each called at 50 randomly selected times. The calls to company A were made independently of the calls to company B. The response times for each call were recorded. The summary statistics were as follows: $$\begin{array} { l l l } & \text { Company A } & \text { Company B } \\ \hline \text { Mean response time } & 7.6 \text { minutes } & 6.9 \text { minutes } \\ \text { Standard deviation } & 1.4 \text { minutes } & 1.7 \text { minutes } \end{array}$$ At the 0.02 level of significance, do the data provide sufficient evidence to conclude that the mean response time for company A differs from the mean response time for company B? Use the P-value approach.

Understand the significance of self-assessment in ethical research practices.

Know the purpose and process of peer review in research.

Learn about the Federal Policy for the Protection of Human Subjects and other standards regulating human subjects research.

Distinguish between confidentiality, anonymity, privacy, and personal safety in research.

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Definitions:

Lateral Position

A body position where the person lies on their side, often used in medical settings for patients having difficulty breathing or to prevent aspiration.

Nursing Assistive Personnel

Health care workers who provide basic nursing care under the supervision of registered nurses or physicians.

Outcome

Condition of a patient at the end of treatment, including the degree of wellness and the need for continuing care, medication, support, counseling, or education.

Cerebellum

A part of the brain at the back of the skull in vertebrates, responsible for coordinating voluntary movements.