Which of the Following Is a Required Condition for Using

Multiple Choice

Which of the following is a required condition for using the normal approximation to the binomial in testing the difference between two population proportions?

A) n₁p₁ ≥ 30 and n₂p₂ ≥ 30
B) n₁p₁ ≥ 5 and n₂p₂ ≥ 5
C) n₁p₁ ≥ 5 , n₁(1-p₁) ≥ 5 , n₂p₂ ≥ 5 and n₂(1-p₂) ≥ 5
D) n₁p̂₁ ≥ 5 , n₁(1-p̂₁) ≥ 5 , n₂p̂₂ ≥ 5 and n₂(1-p̂₂) ≥ 5
E) n₁p₁ ≥ 10 and n₂p₂ ≥ 10