Two Independent samples Standard Deviation -- Hypothesis

Two Independent samples' Standard deviations hypothesis test (2-Samp F-Test)

Samples must be from normal populations. And independent.
H₀: samples from populations with same standard deviations: σ₁=σ₂

H₀: σ₁ = σ₂
Choose one:
H_A: σ₁ < σ₂	"H_A < H₀"	Left-tailed
H_A: σ₁ > σ₂	"H_A > H₀"	Right-tailed
H_A: σ₁ ≠ σ₂	"H_A ≠ H₀"	Two-tailed

Independent samples data: can be different sizes
X1:
X2:

OR Enter the n and s for each sample:
n₁: n₂:
s₁: s₂:

df numerator: df denominator:
F: ratio of the samples' variances.

p-value (FCDF(t)):

Weights:
63 88.9 71.1 83.6 84.2 76.3 69.5 74.4 81.4 72 85.5 111.1
90.8 86.1 101.1 76.9 63 98.4 83.5 65.1 111.5 78

Errors
w/alcohol n=22 s=2.2
w/o   "   n=22 s= .72