What are the 3 variables?

Question

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 normal, ordinal, discrete or continuous

Answer 1

population is the students enrolled at the college

 

sample of 10 students is taken

 

number of courses enrolled is discrete: it must be a non-negative value

 

cost of text books and supplies is continuous, it can be any amount containing fractions of a dollar

 

payment method is ordinal, or can even be nominal. It belongs to one of several categories: cash, debit, credit, check