Question

Target (T) | Macys (M) | Best Buy (B) |

6 | 3 | 11 |

7 | 8 | 5 |

3 | 5 | 8 |

4 | 8 | 4 |

part A) Portfolio 1 is made up of 80% T and 20% M. Portfolio 2 is made up of 30% M and 70% B. What is the sample mean return on portfolio 1. What is the sample mean return on portfolio 2?

part B) What is the variance of portfolio 1?

Part C) What is the variance of portfolio 2?

Part D) Which portfolio is the wisest investment?

Part E)

What is the correlation coefficient of T and M? What is the correlation coefficient of M and B? Which pair of variables tend to move together? How can you tell? Which pair of variables tend to move in opposite directions? How can you tell?

A .7834, .5739, both T and M as well as M and B tend to move together, since both correlation coefficients are positive |
||

B - .2531, .7361 T and M tend to move in opposite directions (negative correlation coefficient), while M and B tend to move together (positive correlation coefficient) |
||

C .0745 and -.9897. T and M tend to move together (positive correlation coefficient) while M and B tend to move in opposite directions (negative correlation coefficient ). |
||

D None of these |

Answer #1

The motion of an underdamped oscillator is described by equation
x=Ae−(b/2m)tcos(ω′t+ϕ).
Let the phase angle ϕ be zero.
Part A
According to this equation, what is the value of x at
t=0?
Express your answer in terms of the variables A,
b, m, ω, and ϕ.
x(0) =
A
SubmitMy AnswersGive
Up
Correct
Part B
What is the magnitude of the velocity at t=0?
Express your answer in terms of the variables A,
b, m, ω, and ϕ.
vx(0) =...

PLEASE FILL IN THE BLANKS WITH THE PROPER TERM! THANKS
Key Terms
----------------------------------------------------------------------------------------------------------------------------
Positive relationship --- Occurs in so far as pairs of
observations tend to occupy similar relative positions in their
respective distribution.
Negative relationship --- Occurs in so far as pairs of
observations tend to occupy dissimilar relative positions in their
respective distribution.
Scatterplot --- a graph containing a cluster of dots
that represents all pairs of observations.
Person correlation coefficient --- A number between –1
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CW 2
List 5 assumptions of the simple linear regression model.
You have estimated the following equation using OLS:
ŷ = 33.75 + 1.45 MALE
where y is annual income in thousands
and MALE is an indicator variable such that it is 1 for
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a) According to this model, what is the average income for
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b) According to this model, what is the average income for
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Select the best answer from the available choices for each
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Which of the following is NOT part of the definition of
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S can be discrete or continuous
Each outcome must be in S at most once
Each element in S is equally likely
Each outcome must be in S at least once
S is a set of possible outcomes in an experiment
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and 3). (Note: You may find it useful to use a computer spreadsheet
program such as Microsoft Excel to calculate your answers.)
Period
Portfolio A
Portfolio B
Factor 1
Factor 2
Factor 3
1
1.02
%
0.00
%
0.02
%
-0.94
%
-1.62
%
2
7.52
6.64
6.82...

Assessment
Identify the Variables!
In rotational kinematics - the variables are:
t = time, which is measured in s (for seconds)
θ = angle = what angle did the object turn thru, usually
measured radians
ωO = initial angular velocity = the rotational speed
of the object at the beginning of the problem, which is measured in
rad/s
ω = final angular velocity = the rotational speed of the object
at the end of the problem, which is measured in...

Most of us know intuitively that in a head-on collision between
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experienced by the truck. To substantiate this view, they point out
that the car is crushed, whereas the truck in only dented. This
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Two boxes are stacked, with box B placed on top of box A. If box
A is pushed such that both boxes move with a decreasing speed, is
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Kinetic friction on box A and static friction on box B
(c) Kinetic friction on box A and kinetic friction on box B (d)
Static friction on box A and kinetic friction on...

5. Which is most likely a curvilinear relationship?
a. IQ and interest in mass market novels sold in grocery
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b. drunkenness and fine motor skills
c. miles driven and fuel burned
d. minutes spent on phone and size of phone bill
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6. A social scientist in Austin sees 470 people waiting in line
for breakfast tacos at Jo’s on South Congress Ave. Strolling along
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1. For a pair of sample x- and y-values, what is the difference
between the observed value of y and the predicted value of y? a) An
outlier b) The explanatory variable c) A residual d) The response
variable
2. Which of the following statements is false:
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