S1 — Value for s1. Provide accurate numbers for a reliable DF. Example: 0.1.
S1 is required
S2 — Value for s2. Provide accurate numbers for a reliable DF. Example: 0.1.
S2 is required
N1 — Value for n1. Provide accurate numbers for a reliable DF. Example: 0.1.
N1 is required
N2 — Value for n2. Provide accurate numbers for a reliable DF. Example: 0.1.
N2 is required
Welch-Satterthwaite degrees of freedom.
Formula
df = (s1**2/n1+s2**2/n2)**2/((s1**2/n1)**2/(n1-1)+(s2**2/n2)**2/(n2-1))