A Traffic Study Found That of 676 Automobiles Entering a Busy

question 13

Multiple Choice

A traffic study found that of 676 automobiles entering a busy intersection during the period from 6 A.M. to 9 A.M., 257 turned left, 221 turned right, and 198 drove straight through the intersection. Below is a summary of the data and the output for the goodness-of-fit test.


Test the hypothesis that the traffic is not equally divided among the three directions. Using a goodness-of-fit test and a 0.05 level of significance, choose the correct decision regarding the null hypothesis and conclusion statement.

• A) Fail to reject H0; There is enough evidence to conclude that the traffic is equally divided among the three directions
• B) Fail to reject H0; There is enough evidence to conclude that the traffic is not equally divided among the three directions
• C) Reject H0; There is enough evidence to conclude that the traffic is equally divided among the three directions
• D) Reject H0; There is enough evidence to conclude that the traffic is not equally divided among the three directions

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Definitions:

Psychopathology

Investigating mental illnesses, covering their manifestations, reasons, and healing approaches.

Cross-Sectional Study

A research method that analyzes data from a population, or a representative subset, at a specific point in time.

Longitudinal Study

A research method that involves repeatedly observing the same subjects over a period, often years or decades, to track changes.

Demand Characteristics

Features of an experimental setting that lead participants to guess the purpose of the study, potentially influencing the behavior being studied.