In a business class,40% of the students have never taken a statistics class,15% have taken only one semester of statistics,and the rest have taken two or more semesters of statistics.The professor randomly assigns students to groups of three to work on a project for the course.What is the probability that the first group mate you meet has studied two or more semesters of statistics?

A) 0.55
B) 0.85
C) 0.15
D) 0.45
E) 0.60

If the group has 30 individuals,what are the degrees of freedom for a dependent-samples t test?

A) 30 - 1
B) 29 - 1
C) 28 - 1
D) 27 -1

The ________ is the observation that occurs the most frequently in the data set.

A) arithmetic mean
B) median
C) mode
D) midrange

Mr. Larsen's will directed that $200,000 be invested to establish a perpetuity making payments at the end of each month to his wife for as long as she lives and subsequently to the Canadian Heart Foundation. What will the payments be if the funds can be invested to earn 5.4% compounded monthly?

Jerry buys a $2,700 motorcycle on a deferred payment plan.There is no down payment and no interest for 18 months.Jerry must make a minimum payment of $75 a month.To avoid a retroactive APR of 21%,he must pay the balance in full before the 18 months has passed.If he pays $75 each month,how much should he pay the last month to avoid the interest charges?

A) $1,350
B) $1,425
C) $1,500
D) $2,075

Decide whether the system $\{\begin{array}{c}5x-6y=4\\ -15x+18y=14\end{array}$ is consistent or inconsistent.

A) inconsistent
B) consistent