exercise assignment questions to be graded exercises 16 and 17

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EXERCISE 16 Questions to Be Graded

Follow your instructor’s directions to submit your answers to the following questions for grading. Your instructor may ask you to write your answers below and submit them as a hard copy for grading. Alternatively, your instructor may ask you to use the space below for notes and submit your answers online at http://evolve.elsevier.com/Grove/Statistics/ under “Questions to Be Graded.”

Name: _______________________________________________________ Class: _____________________

Date: ___________________________________________________________________________________

1. What do degrees of freedom (df) mean? Canbulat et al. (2015) did not provide the dfs in their study. Why is it important to know the df for a t ratio? Using the df formula, calculate the df for this study.

2. What are the means and standard deviations (SDs) for age for the Buzzy intervention and control groups? What statistical analysis is conducted to determine the difference in means for age for the two groups? Was this an appropriate analysis technique? Provide a rationale for your answer.

3. What are the t value and p value for age? What do these results mean?

4. What are the assumptions for conducting the independent samples t-test?

5. Are the groups in this study independent or dependent? Provide a rationale for your answer.

6. What is the null hypothesis for procedural self-reported pain measured with the Wong Baker Faces Scale (WBFS) for the two groups? Was this null hypothesis accepted or rejected in this study? Provide a rationale for your answer.

7. Should a Bonferroni procedure be conducted in this study? Provide a rationale for your answer.

8. What variable has a result of t = −6.135, p = 0.000? What does the result mean?

9. In your opinion, is it an expected or unexpected finding that both t values on Table 2 were found to be statistically significant. Provide a rationale for your answer.

10. Describe one potential clinical benefit for pediatric patients to receive the Buzzy intervention that combined cold and vibration during IV insertion.

EXERCISE 17 Questions to be Graded

Name: _______________________________________________________ Class: _____________________

Date: ___________________________________________________________________________________

1.Assuming that the distribution for intensity of headache symptoms is normal, what percentage of women had headache intensity between 2.3 and 4.7?

2.Assuming that the scores are normally distributed, 68% of the subjects had scores between 0.1 and 5.3 for intensity of shoulder symptoms. Is this statement true or false? Provide a rationale for your answer.

3.Assuming that the distribution for upper extremity muscle flexion is normal, 68% of the subjects scored between what two values for upper extremity muscle flexion?

4.Assuming that the distribution for age is normal, what percentage of the Pain Symptom Group fell between the ages of 46.6 and 55 years? Provide a rationale for your answer.

5.For intensity of shoulder symptoms, did men or women have more variability in their scores? Provide a rationale for your answer.129 1306.A total of 34% of the men, one SD above the mean, had intensity of neck symptoms between 1.4 and 4.8. Is this statement true or false? Provide a rationale for your answer.

7.Assuming that the distribution for intensity of headache symptoms is normal, 68% of the female subjects’ scores around the mean lie between what values? Show your calculations.

8.What are the values for one SD above and below the mean for the age of the male subjects in the Pain Symptoms Group?

9.Assuming that the distribution for upper extremity muscle strength extension is normal, which group had more variability of scores, men or women? Provide a rationale for the variability that you noted in the two groups.

10.The physical exercise intervention, resistance training and guidance together, significantly decreased the intensity of headache (p = 0.001) in the Headache Symptoms Group and the intensity of neck symptoms (p = 0.002) in the Neck Symptoms Group. What do these p values mean? What do these results indicate?

(Grove 129-130)

Grove, Susan K. Statistics for Health Care Research: A Practical Workbook. W.B. Saunders Company, 022007. VitalBook file.

The citation provided is a guideline. Please check each citation for accuracy before use.

 
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