Why is post hoc statistical testing not performed with a two-group ANOVA?
a. A researcher is reluctant to perform a post hoc analysis that would require a more stringent level of significance.
b. The F-statistic would be invalidated by the second test.
c. If hypothesis testing reveals that a difference between groups exists, it is obvious what two groups those are.
d. Sample sizes are not large enough for this analysis.
ANS: C
Post hoc tests have been developed specifically to determine the location of group differences after ANOVA is performed on data from more than two groups. The post-hoc analyses performed after the ANOVA preserves the same level of analysis as the ANOVA itself. The F-statistic is not invalidated by performing a post hoc analysis. Sample size is not a consideration when performing a post hoc analysis.
You might also like to view...
A patient with small bowel obstruction (SBO) due to adhesions is no longer passing gas. She has a fever and has shown no signs of improvement in 24 hours. There is no evidence of stool or gas in the distal intestine on radiograph
What is the most important intervention for this patient at this point? A) Withholding oral food and fluid B) Laparoscopic lysis of adhesions C) Placement of nasogastric tube D) Aggressive treatment with IV fluid and electrolytes
For which of the following infectious diseases can a woman be immunized?
a. Rubella b. Toxoplasmosis c. Cytomegalovirus d. Herpesvirus type 2
A patient with fluctuating levels of awareness, confusion, and disturbed orientation shouts, "Bugs are crawling on my legs. Get them off!" Which problem is the patient experiencing?
a. Aphasia b. Dystonia c. Tactile hallucinations d. Mnemonic disturbance
You are serving on a state committee to develop a state health policy. Which of the following strategies should be done early in the process?
1. Coalition building 2. Select the solution 3. Monitor the outcomes 4. Implement the policy