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henny26
31.10.2019 •
Mathematics
Ayoung investment manager tells his client that the probability of making a positive return with his suggested portfolio is 80%. if it is known that returns are normally distributed with a mean of 5.8%, what is the risk, measured by standard deviation, that this investment manager assumes in his calculation?
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Ответ:
The risk, measured by standard deviation, that this investment manager assumes in his calculation is 0.0689
Step-by-step explanation:
Let X = rate of return
Since his client wants to make a positive return:
X > 0
P(X > 0) = 0.8
P(Z > (0-0.058)/sd) = 0.8
(0-0.058)/sd = -0.8416
-0.058/-0.8416 = standard deviation
standard deviation = 0.0689
Therefore, The risk, measured by standard deviation, that this investment manager assumes in his calculation is 0.0689
Ответ:
Option 2 - f(x)=-2
Step-by-step explanation:
Given : A line of best fit is f(x) ≈ −0.86x + 13.5 for the set of points in the table.
2 12
3 10
5 10
6 8
7 9
8 5
9 6
To find : What is a good approximation for the value of the function, f(x), when x = 18?
Solution :
We have given the function,
The best fit for the value x=18, f(x) is
Approximately, For the value of x=18, f(x)=-2
Therefore, Option 2 is correct.