Describe whether the following study would most likely be observational or experimental, and why it would be so.
* Researchers test two different blood pressure medicines to determine effectiveness.
&Assume that you have selected 10 students enrolled at your college and have collected data for these three variables:
X: number of courses enrolled
Y: total cost of text books and supplies for courses
Z: method of payment used for textbooks and supplies
a.What is the population?
b.What is the sample?
c.Classify the three variables as nominal, ordinal, discrete or continuous.