How many of the following affect the statisitcal power of ANOVA (i.e. the ability to detect...
How many of the following affect the statisitcal power of ANOVA (i.e. the ability to detect a difference between two sample means when on in fact exists)?
i. The sample size in the sample populations (e.g. n=20)
ii. Using a randomized block test to account for confounding (nuisance) variables.
iii. The effect size (i.e. the magnitude of the difference between the sample means).
iv. Ranking the data before analysis (e.g. Kruskal-Wallis procedure)
v. Using R Studio instead of SPSS to calculate the p value for an F statisitic.
Homework Answers
five factors affecting power :
1. Sample Size
2. Standard Deviation
3. Difference between Hypothesized and True Mean
4. Significance Level
5. One- versus Two-Tailed Tests
from these the correct options are :
ANSWER : (i),(iii)
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