In testing the difference between two population means using two independent samples, when is the sampling distribution of the sample mean difference normal?
A) when the sample sizes are both greater than 30
B) when the populations are normal
C) when the populations are non-normal and the sample sizes are large
D) when the populations are non-normal and the sample sizes are small

Question

In testing the difference between two population means using two independent samples, when is the sampling distribution of the sample mean difference  normal?
A) when the sample sizes are both greater than 30 
B) when the populations are normal 
C) when the populations are non-normal and the sample sizes are large 
D) when the populations are non-normal and the sample sizes are small

Quizplus · Accepted Answer

The Answer of In testing the difference between two population means using two independent samples, when is the sampling distribution of the sample mean difference  normal?
A) when the sample sizes are both greater than 30 
B) when the populations are normal 
C) when the populations are non-normal and the sample sizes are large 
D) when the populations are non-normal and the sample sizes are small

In Testing the Difference Between Two Population Means Using Two