Three Different Sections of the Same Interstate Highway,with Roughly Equal

question 36

Essay

Three different sections of the same Interstate highway,with roughly equal traffic volumes,have been patrolled by the State Police at different levels of intensity for the past six months.The posted speed limit is 55 and the speeds of a random samples of motorists have been registered for each of the three sections.Is there any statistically significant difference in the speeds? Use the five step model as a guide and write a sentence or two of interpretation for your results.
$\begin{array}{lll}\text { Lightly } & \text { Moderately } & \text { Heavily } \\\underline{\text { Patrolled } }&\underline{\text { Patrolled }} & \underline{\text { Patrolled }} \\ 55 & 57 &50 \\48 & 58 & 51 \\58 & 58 & 60 \\65 & 55 & 58 \\72 & 55 & 55 \\67 & 59 & 52 \\54 & 58 & 55 \\65 & 54 & 53\end{array}$

---

Definitions:

Laboratory Observation

Research method in which all participants are observed under the same controlled conditions.

One-Way Mirror

A mirror that is reflective on one side and transparent on the other, often used in observational research and police line-ups to observe subjects without being seen.

Research Method

A systematic plan for conducting research, including techniques and procedures for collecting and analyzing data to gain new knowledge or understand a topic better.

Research Design

The framework or plan for a study that guides the collection and analysis of data to ensure valid and reliable results.