A researcher wants to determine if teenage drivers of red automobiles are more likely to run a red light than automobiles of any other color. She stands at a busy intersection and records the colors of automobiles which run red lights. I. What is the population? Would the population be all red cars II. What is the sample? III. Is the study observational or experimental? Justify your answer. Would it be observational because she doesn\'t know who are teenagers or not she is just observing IV. What are the variables? V. For each of those variables what level of measurement (nominal, ordinal, interval, or ratio) was used to obtain data from these variables? Solution I- total no of people III - It is an observational study because no treatment has been applied by the experimenter, and the experimenter had no control over creating a control and experimental group..

1. A researcher wants to determine if teenage drivers of red automobiles are more likely to run a
red light than automobiles of any other color. She stands at a busy intersection and records the
colors of automobiles which run red lights.
I. What is the population? Would the population be all red cars
II. What is the sample?
III. Is the study observational or experimental? Justify your answer. Would it be observational
because she doesn't know who are teenagers or not she is just observing
IV. What are the variables?
V. For each of those variables what level of measurement (nominal, ordinal, interval, or ratio)
was used to obtain data from these variables?
Solution
I- total no of people III - It is an observational study because no treatment has been
applied by the experimenter, and the experimenter had no control over creating a control and
experimental group.