Assume that we have independent samples from each of two populations of sizes n1 and n2 , where the sample sizes are considered to be large. Find a (1 - a)lOO% confidence interval for (µ1 + µ2 )/2....

Assume that we have independent samples from each of two populations of sizes n1 and n2 , where the sample sizes are considered

to be large. Find a (1 - a)lOO% confidence interval for

(µ1 + µ2 )/2. Assume that a1 and a 2 are unknown and may be