Which of the following represents a population,as opposed to a sample?

A) 2,000 respondents to a magazine survey which has 600,000 subscribers.
B) The first 15 students in your class completing a final exam.
C) Every fourth student to arrive at the book store on your campus.
D) All registered voters in the state of West Virginia

A cross-classification table is the same thing as two frequency distribution tables,one for each variable.

When the lines representing the effects of two variables are parallel on a graph,you have ______.

A) an interaction effect
B) no interaction effect
C) possibly an interaction effect
D) an effect that cannot be determined

Express the following ratio in its lowest terms: 2.5: 3.5: 3

Calculate the missing value:

An enterprising student bought 12 ounces of inexpensive perfume, repackaged it, and resold it in 15-milliliter bottles. How many bottles did she have to sell? Round to the nearest whole number.​

Pearson's product-moment correlation coefficient is represented by which of the following?

A) r
B) p
C) Σ
D) 

Calculate the term of the loan or investment:

Chef Robert paid $95.20 for 6 gallons of chocolate syrup. What was his cost per liter? Round to the nearest cent.​

Determine the present value of the ordinary annuity: