Which one of the following is the formula to calculate standard error of mean differences of two sample group? – Ascendance Academy

Q.

1

A

σp/√n
B

σ₁²/n¹+ σ₂²/ n²
C

σ₁²/ σ₂^2,when σ₁²< σ₂²
D

P¹q¹/n¹+p²q²/n²