What is the "interruption" in an interrupted time series design?
1. introduction of the independent variable
2. instrumentation failure
3. a period of at least two weeks
4. a brief period when measurements are taken

Annuity payments are assumed to come at the end of each payment period (termed an ordinary annuity). however, an exception occurs when the annuity payments come at the beginning of each period (termed an annuity due). what is the future value of a 13-year annuity of $2,800 per period where payments come at the beginning of each period? the interest rate is 9 percent. use appendix c for an approximate answer, but calculate your final answer using the formula and financial calculator methods. to find the future value of an annuity due when using the appendix tables, add 1 to n and subtract 1 from the tabular value. for example, to find the future value of a $100 payment at the beginning of each period for five periods at 10 percent, go to appendix c for n = 6 and i = 10 percent. look up the value of 7.716 and subtract 1 from it for an answer of 6.716 or $671.60 ($100 × 6.716)

Diamond motor car company produces some of the most luxurious and expensive cars in the world. typically, only a single dealership is authorized to sell its cars in certain major cities. in less populous areas, diamond authorizes a single dealer for an entire state or region. the manufacturer of diamond automobiles is using a(n) distribution strategy for its product.

Jorge is attending college next year. he just got information on the college costs and the financial aid package the college is offering. jorge knows his parents can contribute $4,500 each year. jorge’s college costs & financial aid package per year costs financial aid package tuition & fees grants & scholarship $26,000 $18,500 room & board work-study $12,500 $8,500 how much will jorge need to pay each year from his own savings and from loans? $3,000 $7,000 $7,500 $11,500