A study is conducted to find out if the traffic light patterns at the busy intersection required to be adjusted to help the flow of traffic. Data on the volume of traffic and traffic patterns during different times of day are recorded.
I. What is the population?
II. What is the sample?
III. Is the study observational or experimental? Justify your answer.
IV. What are the variables?
V. For each and every of those variables, what level of measurement (nominal, ordinal, interval, or ratio) was employed to obtain data from these variables?