Sample 1: 2.18 2.23 1.96 2.24 2.72 1.87 2.68 2.15 2.49 2.05
Sample 2: 1.82 1.26 2.00 1.89 1.73 2.03 1.43 2.05 1.54 2.5 1.99 2.13
a. Let u1 be the mean of the population1 and u2 be the mean of pop. 2. What is the point estimate of u1- u2?
b. Construct a 99% confidence interval for u1-u2.
c. Test at 2.5% significance level if u1 is lower than u2.