Q 1. Suppose you take independent random samples from populations with means Mu1 and Mu2 and standard deviations Stdev1 and stdev2. Furthermore, assume either that (i) both populations have normal distributions, or (ii) the sample sizes (n1 and n2) are large. If X1 and X2 are the random sample means, then how does the quantity:

(xbar1-xbar2)-((Mu1-Mu2)/Sgrtstdev^2/1/n1+Stdev^2/2/n2 behave?

Give the name of the distribution and any parameters needed to describe it.