But alll 77% 2:25 PM Need Help? Read It Watch it Master it 7. + 1.48/9 points Previous Answers My Notes + Ask Your Teacher Do bonds reduce the
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The calculations i keep getting are wrong and this is a complicated question where I struggle with the

calculations

Part D says compute the coefficients of variation for each fund (Round your answers to the nearest whole number.Screenshot_20191001-142507_Chrome.jpg

Screenshot_20191001-142507_Chrome.jpg

But alll 77% 2:25 PM
Need Help? Read It Watch it Master it
7. + 1.48/9 points Previous Answers
My Notes + Ask Your Teacher
Do bonds reduce the overall risk of an investment
portfolio? Let x be a random variable representing
annual percent return for Vanguard Total Stock
Index (all stocks). Let y be a random variable
representing annual return for Vanguard Balanced
Index (60% stock and 40% bond). For the past
several years, we have the following data.
x 16 0 22 16 32 18 25 -13 -19 -10
V. 21 -6 19 8 21 21 26 -9
-7
-7
(a) Compute Ex, Ex2, Zy, Zy2.
Ex
Ex 2
Ey
(b) Use the results of part (a) to compute the
sample mean, variance, and standard deviation
for x and for y. (Round your answers to two
decimal places.)
(c) Compute a 75% Chebyshev interval around
the mean for x values and also for y values.
(Round your answers to two decimal places.)
Lower Limit
Upper Limit
Use the intervals to compare the two funds.
75%% of the returns for the balanced fund fall within a narrower range than those of the stock fund.
75% of the returns for the stock fund fall within a narrower range than those of the balanced fund.
25% of the returns for the balanced fund fall within a narrower range than those of the stock fund.
25% of the returns for the stock fund fall within a wider range than those of the balanced fund.
(d) Compute the coefficient of variation for each

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Screenshot (464).png

Screenshot (466).png

Screenshot (468).png

Screenshot (470).png

A
B
C
D
E
F
G
X
y
[x
W N
Ey
16
21
=B2
=C2
=D2*D2
=E2*E2
0
-6
=B3
=C3
=D3*D3
=E3*E3
22
19
=B4
=C4
=D4*D4
=E4*E4
16
8
=B5
=D5*D5
=E5*E5
32
21
=86
=C6
=D6*D6
=E6*E6
18
21
=B7
=C7
=D7*D7
=7*E7
25
26...

Screenshot (472).png

A
B
C
D
E
F
G
H
X
Y
Ey
Sx2
[yz
16
21
16
21
256
441
0
-6
0
-6
0
36
A
22
19
22
19
484
361
16
8
16
8
256
64
32
21
32
21
1024
441
18
21
18
21
324
441
8
25
26
25
26
625
g
676
-13
-9
-13
-9
169
81
10...

Screenshot (474).png

A
B
C
D
E
F
G
X
y
SX
A W N
Ey
16
21
=B2
=C2
=D2*D2
=E2*E2
0
-6
=B3
=C3
=D3*D3
=E3*E3
22
19
=B4
=C4
=D4*D4
=E4*E4
16
8
=85
=C5
=D5*D5
=E5*E5
32
21
=86
=C6
=D6*D6
=E6*E6
18
21
=B7
=C7
=D7*D7
=[7*E7...

Screenshot (476).png

A
C
D
F
F
G
H
X
Y
Sx
Ey
Sx2
16
21
16
21
256
441
0
-6
0
-6
0
36
22
19
22
19
484
361
16
8
16
8
256
64
32
21
32
21
1024
441
18
21
18
21
324
441
8
25
26
25
26
625
676
-13
-9
-13
-9
169
81
10
-19
-7...

Screenshot (478).png

A
B
C
D
E
F
G
X
y
Ey
16
21
=B2
=C2
=D2*D2
=E2*E2
0
-6
=B3
=C3
=D3*D3
=E3*E3
22
19
=B4
=C4
=D4*D4
=E4*E4
16
8
=85
=C5
=D5*D5
=E5 *E5
32
21
=B6
=C6
=D6*D6
=E6*E6
18
21
=B7
=C7
=D7*D7
=[7*E7
8
25
26...

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