Answer
The first confidence interval is made for the mean of the differences of the samples' and the second confidence interval is made for the differences of the means of the samples'.
Essentials of Statistics (5th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0-32192-459-2
ISBN 13:
978-0-32192-459-9
Chapter 9 - Inferences from Two Samples - 9-4 Two Dependent Samples (Matched Pairs) - Page 468: 4
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