Power and Sample Size Calculator
Population Parameters:
Mean under null hypothesis (μ
o
):
Mean under alternative hypothesis (μ
a
):
Standard deviation (σ):
Null Hypothesis:
μ = μ
o
Alternative Hypothesis:
μ < μ
o
(Lower tail test)
μ > μ
o
(Upper tail test)
μ ≠ μ
o
(Two tail test)
Level of significance (α):
Sample size (n):
Power (1-β):