Distribution of the Difference Between TwoSample Means (1)• Sampling from normally distributed populations– Sampling distribution of ݔଵ̅ െ ݔ̅ଶ : construction• To select from population 1 all possible samples of size 15 and computethe mean for each sample.• To select from population 2 all possible samples of size 15 and computethe mean for each sample.• To take all possible pairs of sample means, one from population 1 andone from population 2