Power table Flashcards
Statistical power is the …….
Statistical power is the probability of rejecting a false null hypothesis.
Statistical power is influenced by 4 factors?
Sample size;
Variability (standard deviation)
Effect size
Significance level (alpha; a)
sample size decrease. what power?
decr.
sample size increase. what power?
incr.
sample size decrease. note?
more difficult to detect effects
variability of outcome incr., what power?
decreases
sample size increase. note?
easier to detect effect
variability of outcome decr., what power?
increases
variability of outcome incr., note?
more difficult to detect effects
variability of outcome decr., note?
easier to detect effects
effect size increases, what power?
increase
effect size decreases, what power?
decreases
effect size increases, note?
easier to identify large effect
effect size decreases, note?
more difficult to identify small effect
significance level (alpha) incr., power?
increases
