A comparison of the last year's (Population 1) versus the current year's (Population 2) shipments (in thousands of dollars) for each of six Canadian exporters is given as follows: (4.34, 4.77), (5.89, 5.16), (2.52, 2.73), (3.91, 4.39), (4.99, 5.25), (3.24, 3.80). It is assumed that the population of differences between the last year’s and the current year's shipments is approximately normal. Then a 95% confidence interval estimate for the mean difference is:
Question 9 options:
-0.5787 to 0.1753
-0.6765 to 0.2731
-0.5926 to 0.1893
-0.7005 to 0.2972