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.     a. Construct a 90​% confidence interval estimate for the mean yield of​ one-year CDs.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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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.
 
 
a. Construct a 90​% confidence interval estimate for the mean yield of​ one-year CDs.

 

Bank
One-Year CD
Five-Year CD
1
0.45
4.90
2
0.70
5.00
3
0.85
4.95
4
0.35
3.30
0.40
4.00
0.35
3.90
7
0.65
3.80
2.00
4.40
9
0.65
4.65
10
0.55
4.10
11
0.45
4.55
12
0.45
3.50
13
0.45
4.25
14
0.60
5.10
15
1.65
4.15
16
1.00
4.35
17
1.50
5.05
18
2.25
4.60
19
1.05
5.10
20
0.95
4.60
21
0.45
4.50
22
0.60
3.95
23
0.40
3.40
24
1.10
4.45
25
2.10
4.05
Transcribed Image Text:Bank One-Year CD Five-Year CD 1 0.45 4.90 2 0.70 5.00 3 0.85 4.95 4 0.35 3.30 0.40 4.00 0.35 3.90 7 0.65 3.80 2.00 4.40 9 0.65 4.65 10 0.55 4.10 11 0.45 4.55 12 0.45 3.50 13 0.45 4.25 14 0.60 5.10 15 1.65 4.15 16 1.00 4.35 17 1.50 5.05 18 2.25 4.60 19 1.05 5.10 20 0.95 4.60 21 0.45 4.50 22 0.60 3.95 23 0.40 3.40 24 1.10 4.45 25 2.10 4.05
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