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Is there a difference in the yields of different types of? investments? The accompanying data provide yields for a? one-year certificate of deposit? (CD) and a? five-year CD for 25 banks. Complete parts a through c below.
Yields for? one-year CDs and? five-year CDs:
Bank 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
One-Year CD 0.4 0.75 0.95 0.3 0.45 0.3 0.45 2.05 0.75 0.55 0.3 0.4 0.3 0.65 1.75 1 1.45 2.25 0.95 1.05 0.5 0.4 0.2 1.05 2
Five-Year CD 4.8 4.85 4.9 3.35 3.95 3.9 3.7 4.3 4.8 4.2 4.4 3.6 4.2 4.9 4.2 4.2 5.1 4.75 5 4.4 4.55 4.1 3.55 4.5 4.05
a. Construct a 90?% confidence interval estimate for the mean yield of? one-year CDs.
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