Part -1:
A study of dental pain found that patients given ibuprofen on the 1st day after surgery had a mean pain rating of 62.7. Assume that this is the population mean pain rating of all dental patients given ibuprofen on the 1st day after surgery.
Claim: 2-pain medications are better than one. Giving both ibuprofen and acetaminophen would cause patients to have a mean pain rating on the first day after surgery <62.7.
Perform all 4 steps of the hypothesis test of the claim,given that the same dental pain study with the link above collected a sample of 35 dental patients and gave them both ibuprofen and acetaminophen through the first day after surgery.
Themean pain rating of the 35 patients=54.6
Standard deviation= 43.4.
Use the 0.05 significance level.
Clearly show Step 1 to Step 4
1. Is ibuprofen alone significantly different (in the statistical sense) in relieving pain than ibuprofen and acetaminophen together?
2. Which medication(s) would you rather take for dental pain given these results?
3. Explain your choice of medication(s) in number 2 above.
Clinical Research - Efficacy of Ibuprofen and Ibuprofen/Acetaminophen on Postoperative Pain in Symptomatic Patients with a Pulpal Diagnosis of Necrosis
By - L. Kevin Wells, DMD, MS, Melissa Drum, DDS, MS, John Nusstein, DDS, MS,Al Reader, DDS, MS, and Mike Beck, DDS, MA
Part -2:
This table contains the results of a poll of congressional job approval in numbers of people.
|
Polling Organization
|
Approve
|
Disapprove
|
|
News Network
|
234
|
1186
|
|
Independent Company
|
185
|
802
|
Email me with the results of the optional Forum. Complete all the answers to all the numbers below.
1. Perform a chi-square test of independence using StatCrunch. Paste the results window here.
2. In full sentences, tell me what are the null and alternative hypotheses for this chi-square test of independence? In your statements, be specific to the variables in the poll.
3. What is the value of the chi-square statistic and what is the p-value?
4. Given the values in number 3 above, should you reject or not reject the null hypothesis?
5. Given your decision in number 4 above (based on the information in number 3 above), what is the conclusion of the hypothesis test of independence? Use full sentences and refer to the hypotheses in number 2 above in your explanation.