Question

An investigator wants to know what types of vehicles accessed the highways in his city during the past week. He has access to traffic camera footage of each highway entrance ramp for that time period. There are no clear differences in the type of traffic seen at different times of day or at different locations.

Answer 1

Technology such as traffic cameras, transponders, and GPS devices enable detailed analysis of traffic data, helping investigators study vehicle types on highways, although privacy concerns arise. Distinctions between testable and non-testable hypotheses are crucial in traffic analysis.

Step-by-step explanation:

Technology has drastically altered the ways in which traffic data is collected and analyzed. Modern advancements such as traffic cameras, electronic toll collection with transponders, and the widespread use of GPS devices enable detailed traffic monitoring. An investigator studying the types of vehicles accessing highways can utilize these tools to gather comprehensive data without significantly differing conditions affecting the outcome. However, it's important to distinguish between testable and non-testable hypotheses when analyzing this data.

For instance, hypotheses concerning the average number of vehicles passing a certain point per day or the average speed of vehicles are testable with the aid of technology. Conversely, hypotheses regarding the gravitational pull on each vehicle while in motion or specific vehicle emissions without proper sensors in place are typically non-testable as they require different measurements or equipment.

Data collection technologies also raise questions about privacy and surveillance, as they can track the movements not only of vehicles but also of pedestrians and cyclists. Nonetheless, these technological advancements provide critical insights into traffic patterns, safety analysis, and urban planning.

Answer 2

If the question is what type of sample the researcher used for his study, he used a random sample.

Step-by-step explanation:

When conducting a study, one of the steps is to choose the sample of the population that will be studied.

In this case, the researcher used a random sample where all the people in the population have the possibility to participate. As described in this study, all the cars that entered the city were part of the random sample since the survey was not discarding any model, nor access time during the time of the study, since it sought to study what was the type of vehicle with higher income.

I hope this information can help you.