Question

1. For each of the following scenarios, please write a directional research hypothesis statement.
2. 1. Researchers conducted a study to test the effectiveness of a cognitive-behavioral telephone therapy intervention for patients with breast cancer. Women in the study were randomly assigned to the intervention or to a control group. The dependent variables were psychological distress, coping and quality of life and these were measured at baseline and at follow-up, and changes over time were determined.
3. 2. A researcher wishes to assess the effectiveness of relaxation instruction upon subsequent self-reported chronic back pain. She selects 25 patients from those admitted to a clinic during the month of January who report extreme back pain and measures them both before and after they receive relaxation instruction.
4. 3. A researcher administers a job satisfaction survey to nurses in a large academic medical center. The researcher wants to correlate nurses’ job satisfaction with nurse retention rates in the facility. There was an 80% response rate for the survey
5. 4. A hospital introduces a new order-entry system and wishes to study the impact of this intervention on the number of medication-related adverse events before and after the intervention. The hospital is going to collect data before the new order-entry system is in place and then after the system is in place to determine if the number of medication-related adverse events decreases. The dependent variable is the number of medication-related events. The independent variable is the new order-entry system.

Answer 1

A)

$Ho : \mu_1 = \mu_2$

$Ha : \mu_1 > \mu_2$

1 - Intervention group

2- control group

I am assuming , that mu increases if quality of life increases

b)

$H_o : \mu_d = 0$

$H_a : \mu_d < 0$

$\mu_d$ is before - after    pain level

c)

$H_o : \rho = 0$

$H_a : \rho > 0$

d)

$H_a : \mu_d = 0$

$H_a : \mu_d < 0$