If two variables, x and y, have a strong linear relationship, then

A) there may or may not be any causal relationship between x and y.
B) x causes y to happen.
C) y causes x to happen.
D) the F test is used to conclude there is a causal relationship between x and y.

Which of the following indicates a very significant correlation?

A) p = 0.05
B) p < 0.05
C) p < 0.01
D) p < 0.50

How much more will an investment of $10,000 earning 8% compounded annually be worth after 15 years than after 10 years? Calculate the difference in dollars and as a percentage of the smaller maturity value.

Calculate the maturity value of the five-year compound-interest GIC whose interest rate for each year is given. Also calculate the dollar amount of interest earned in the fourth year.

Simplify the following expression:
$\frac{2.8x}{2}-\frac{6.15x}{1.5}-\frac{2x}{2.75}$

SXF, Inc. had net sales of $450,000 and net income of $35,000. Compute the relationship of net income to net sales. Express your answer as a percentage. (Round answer to two decimal places.)