Question

Police radar equipment is used to detect the speed of objects. In one trial, the radar equipment records a stationary tree as traveling at 6 mph, although in another trial it records the tree as traveling at 0 mph. Which of the following measurement problems exist in the radar equipment? Correct Answer(s) 1. reliability 2. construct 3. validity 4. accuracy

Answer 1

The measurement problems that exist in the radar equipment are accuracy , reliability

Explanation:

There are two different kinds of Radar that is being used such as rotating- antenna radar and  traffic radar. The type of radar that is being used by police contains a stationary single antenna. this will be pointing in one direction. The signal that is modulated will not be sent. There will not be any cathode ray screen for displaying the collected information.

As the antenna points only one direction it can measure only the speed of those object that is either moving towards or away from the radar. It cannot sense the kind of object that it is measuring and it could not also tell the direction in which the object is travelling. Hence, the reliability and the accuracy are the main measurement problems.