1.The correlation between the number of days absent per year and annual salary among 100 employees of an insurance company was found to be r= -.23 (p= .02).Based on this finding, which of the following statements could be made?

a.Employees who earn higher salaries are more likely to be absent than those who earn lower salaries

b.Based on this finding, the null hypothesis must be accepted

c.Only individuals who earn low salaries are frequently absent from work

d.As salary level increases, the number of absences decreases

2.Which of the following examples would require the use of a paired samples (or dependent samples) t test to compare group means?

a.Two groups of patients were treated for ankle sprains, using two different treatments. The researcher wanted to determine which treatment was more effective.

b.A researcher wanted to know if recovery time was quicker among patients who received additional in-home care than among those who received the standard amount.

c.A group of hypertensive patients was given a DVD to view at home, which contained information on ways to lower blood pressure.Six weeks later, their systolic and diastolic pressures were compared to those of a group of hypertensive patients who had not received the DVD.

d.Cardiovascular risk scores were calculated on a group of middle-aged men.The group was then provided access to an exercise and wellness program that included nutritional counseling and stress reduction training. Six months later, their risk scores were again calculated and compared to their original scores.