WorksheetsEffect Sizes Practice Quiz
Total questions: 10
Worksheet time: 7mins
Which of the following statements are TRUE of the effect size?
quantifies the practical significance of a finding
reflects the odds that a particular finding could have occurred by chance
reflects the magnitude, or size, of the difference
number measuring the strength of the relationship between two variables
The effect size is more important than statistical significance in clinical and commercial contexts.
TRUE
FALSE
Both are equally important
What are the three classes of effect sizes?
Standardized Difference ES, Variance Accounted for ES, Corrected ES
Cohen's d, Glass' delta, Omega 2
alpha, beta, power
eta 2, partial eta 2, omega 2 , p-value
In solving for Cohen's d, solving towards the direction of improvement yields a (a) result.
A computed Cohen's d value of .79 means that the effect size is _____
small
medium
large
negligible
Which of the following are known formulas for η2?
SSTreatment/(SSTreatment + SSError)
SSeffect / SStotal
SSbetween / SStotal
SStotal / SSerror + SSbetween
A computed (eta) η2 value of .06 and below is ___.
small
medium
large
The_______is an effect size used in the analysis of variance that is a more conservative estimate of effect size.
ω2
η2
η2 p
Glass Δ
What are needed to conduct a power analysis?
alpha
beta
sample size
effect size
Which of the following formula would be used to compute for sd pooled for Cohen's d if the number of samples for each group is different?
√(s12+ s22)/2
s12 + s22/2
√[s12 (n1-1)+ s22 (n2-1)]/ (n1+n2-2)
