Statistical power calculator
F Distribution
Statistical Power Information
Statistical Power Calculators
F Sample Size Calculator
Distribution
Power calculation
Calculate the test power basted on the sample size and draw a power analysis chart.
Use this test for one of the following tests:
F-Test for variances
Statistic Data
digits:
1
2
3
4
5
6
7
6
9
10
example digits=2: (0.001234 => 0.0012)
tails:
two (Ho:σ1=σ2)
left (Ho:σ1≥σ2)
right (Ho:σ1≤σ2)
distribution:
F
α:
significant level (0-1), maximum chance allowed rejecting H
_{0}
while H
_{0}
is correct (Type1 Error)
ratio var1/var2
The power is expected to identify the effect. If one exists, H
_{0}
will be rejected.
effect size
- the ratio the test is expected identify. examples:
1.05
- Var
_{1}
is bigger than Var
_{2}
by 5%
1.1
- Var
_{1}
is bigger than Var
_{2}
by 10%
n1:
Group1 sample size
n2:
Group2 sample size
Calculate
Clear
validation message