State highway safety experts claim that the recent increase in highway fatalities involving tractor trailers is a result of truckers receiving insufficient rest.They randomly sample 200 truckers who are making interstate deliveries and record the total amount of nondriving 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

Question

Quizplus · Accepted Answer

This study is an observational study because the researchers are simply observing and recording data about the truckers without intervening or manipulating any variables.

State Highway Safety Experts Claim That the Recent Increase in Highway