State Highway Safety Experts Claim That the Recent Rise in Highway

question 29

Multiple Choice

State highway safety experts claim that the recent rise in highway fatalities involving tractor trailers is a result of truckers receiving insufficient rest.They randomly sample 200 truckers who are on interstate deliveries and record the total amount of non-driving time they have had over the past 72 hours.This study is BEST described as a(n) _____ study.

• A) observational
• B) longitudinal
• C) experimental
• D) inferential

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Definitions:

T Cells

A type of lymphocyte that plays a central role in cell-mediated immunity, differentiating in the thymus.

B Cells

A type of white blood cell involved in the immune response by producing antibodies to neutralize pathogens.

Antigens

Substances or molecules that are recognized by the immune system and can evoke an immune response.

Thymus

A gland located behind the sternum and between the lungs that is involved in the development of the body's immune system, particularly in maturing T lymphocytes.