If Two Random Samples of Sizes N₁ and N₂ Are

question 134

Multiple Choice

If two random samples of sizes n₁ and n₂ are selected independently from two non-normally distributed populations,then the sampling distribution of the sample mean difference, ,is

• A)always non-normal
• B)always normal
• C)approximately normal only if n₁ and n₂ are both larger than or equal to 30
• D)approximately normal regardless of n₁ and n₂