Research has indicated that the blankety-blank aptitude test yields a validity coefficient of about .50 when used to select applicants for algebra classes. your school used the blankety-blank as a selection device by eliminating half of the lowest scoring students. considering only those students who have been admitted into algebra classes, what validity coefficient would you expect for them?

Retirement investment advisors, inc., has just offered you an annual interest rate of 4.4 percent until you retire in 40 years. you believe that interest rates will increase over the next year and you would be offered 5 percent per year one year from today. if you plan to deposit $13,000 into the account either this year or next year, how much more will you have when you retire if you wait one year to make your deposit?