Celia is a nurse in a geriatric ward.  She noticed that older persons in her care are having problems sleeping at night.  She decided to introduce non-pharmocologic ways of relaxation, specifically, music therapy, massage therapy and aromatherapy.  The results below show the number of hours of uninterrupted sleep of the older persons after each intervention.

Questions

1. What do you think is the appropriate sampling technique?  Justify your answer.

2. Conduct a hypothesis testing if she were comparing music and aromatherapy.  Show the step-by-step process of hypothesis testing including the choice of statistical test. Be guided by the examples in your N298  module

1. Null and alternative hypotheses
2. Level of significance
3. Test-statistic
4. Critical region
5. Computation of test-statistic
6. Decision
7. Conclusion

3. Conduct a hypothesis testing if she were comparing the three relaxation techniques.  Show the step-by-step process of hypothesis testing including the choice of statistical test. Be guided by the examples in your N298  module 

1. Null and alternative hypotheses
2. Level of significance
3. Test-statistic
4. Critical region
5. Computation of test-statistic
6. Decision
7. Conclusion

4. Write your conclusion and recommendations for the study after knowing the results of the hypotheses testing?