Question

1. Physicians are investigating the treatment of a particular virus.  They have three analgesics available; Aspirin, Acetaminophen, and Ibuprofen.  Furthermore, they wish to know whether to recommend Eatingor Fastingduring the course of this illness.  They prepare a 10-point rating scale to measure distress, with 10 being high distress and 0 being no distress.  They assign 30 patients randomly to these conditions. The distress ratings are shown in the table below.  Do the treatments have any differential effect ?

1. (1 pt) State the null and alternative hypotheses
2. (14 pts) Compute the appropriate test statistic using SPSS and complete the Summary Table below.  Use Tukey’s HSD for your post hoc test if appropriate.  Compute simple main effects when appropriate.

3. 	Analgesic
   	Aspirin	Acetaminophen	Ibuprofen
   Eat	4	2	1
   	4	4	3
   	8	3	4
   	5	6	1
   	5	1	8
   Fast	9	0	4
   	1	2	0
   	10	1	8
   	3	4	10
   	6	0	5

4. (9 pts) Write the Results section for your findings.  Include the descriptive statistics, type of statistical test and results of the test and post hoc tests if applicable, effect size, η²_partialand the confidence interval.
5. (1 pt.)  Copy and paste the Means Plot

6. Source	SS	df	MS	F	SPSS Sig.	Decision
   Factor A
   Factor B
   A X B
   Within
   TOTAL

   What is:   Factor A =____________       and Factor B = ____________

Answer 1

a)

Ho: There is no difference in analgesics

Ha : There is difference in analgesics

Ho: There is no difference in Eating or Fasting

Ha : There is difference in Eating or Fasting

Ho : there is no interaction

Ha: there is an interaction

b)

c) and d)

since p-value for both main effects and interaction are greater than 0.05 alplha

we fai lto reject the null hypothesis

we conclude that there is no significant main effects or interaction