Comparing Variances of the Sample Means

Hi,

"Suppose that two populations have equal population variances but have different sizes: $\displaystyle N_1=100,000, N_2=10,000,000 $. Compare the variances of the sample means for a sample of size $\displaystyle n=25 $. Is it easier to approximate the mean of a smaller population?"

Where do I even begin? :(

Re: Comparing Variances of the Sample Means

Hey SC313.

What do the N's refer to? (Are you dealing with finite populations as opposed to infinite ones)?

Re: Comparing Variances of the Sample Means

Quote:

Originally Posted by

**chiro** Hey SC313.

What do the N's refer to? (Are you dealing with finite populations as opposed to infinite ones)?

Hi Chiro!

N is the population size $\displaystyle N_1=10,000, N_2 is 10,000,000 $.

And the populations are finite!

Thanks!

Re: Comparing Variances of the Sample Means