What are the three components contributing to the margin of error for a sample taken from a finite population?

An auto insurance company was interested in investigating accident rates for drivers in different age groups.The following table was based on a random sample of drivers and classifies drivers by age group and accident rate. Age Group $$\begin{array}{cccc}\begin{array}{c}\text{ Number of accidents }\\ \text{ in past 3 years }\end{array}& \text{ Under 25 }& 25-45& \text{ Over 45 }\\ 0& 0.121& 0.196& 0.385\\ 1& 0.086& 0.074& 0.080\\ >1& 0.025& 0.014& 0.019\end{array}$$ Suppose one of these people is selected at random.Compute the probability that the person is aged over 45.

A) 0.548
B) 0.385
C) 0.080
D) 0.795
E) 0.484

Multiple correlation provides researchers the ability to ______.

A) test a variety of effects
B) accurately support the alternative hypothesis
C) provide assurance of significant results
D) easily calculate results

Dynacan Ltd. manufactured 10,000 units of product last year and identified the following manufacturing and overhead costs. (V denotes "variable cost" and F denotes "fixed cost.")
If unit variable costs and fixed costs remain unchanged, calculate the total cost to produce 9700 units this year.

An investor bought two bonds. bond A was an 8% bond at 102 and bond B was an 8½% bond at 104. The commission was $5 per bond. Compute how much greater the current yield from bond B is than from bond A. (Round yields to two decimal places.)