Question

1) Please summarize from a conceptual perspective that ties t, f, and correlation/regression together.

Answer #1

Hi,

According to the question:

Correlation tells about the linear relationship between two variables while regression tells about the functional form of relationship between two variables in which one variable is a dependent variable while other variables are independent variables.

Consider a multiple linear regression model with 3 independent variables. Then, t test is used to test significance of individual regression of an independent variable while F test is used to test the significance of overall regression, considering all independent variables together.

Thanks!

Regression/Correlation differs from ANOVA and t-test in what
way?

T/F
From a U.S. importer’s and exporter’s perspective, appreciation
of the foreign currency will generate foreign exchange losses on
payables created from its import purchase of goods from foreign
sellers and foreign exchange gains on receivables created from its
export sale of goods to foreign buyers.

1. T/F and explain: In simple linear regression there can be
only one independent and one dependent variable, but in multiple
regression there can be more than one independent variable and more
than one dependent variable.
.2. From regression, using you own words, define the Error
Term.
3. Why is it important to check for correlation between
independent variables in multiple regression?
4. Assume two of your right hand side variables are correlated.
What techniques are available to you to...

1)Adding an outlier in a scatterplot will do which of the
following to the correlation coefficient? Explain
a) Increase the correlation coefficient
b) Decrease the correlation coefficient
c) Change the correlation coefficient from positive to
negative
d) Change the correlation coefficient from negative to
positive
e) All options above are possible
2) When the correlation coefficient is close to +1, it
indicates. Please explain
a) changes in one variable cause changes in the other, but we
don't know which one...

Summarize all the rules, including formulae (not
PhStat), of the following topics that we covered (and will still
cover) in the course.
i. Determination for the Mean
ii. Determination for the Proportion
f. Hypothesis Testing
f (1). Z Test for the Mean
f (2). t Test for the Mean
f (3). Z test for the Proportion
g. Simple Regression
PREFERRABLY TYPED PLEASE. EASIER TO UNDERSTAND.

Please answer these true and false.
T or F - the cardiac cycles of the atria and ventricles occur at
the same time.
T or F - The pulmonary circuit of blood flow is the flow of
oxygenated blood from the ventricle to the active tissue.
T or F - Pulmonary function testing recommended for an
individual who is a regular smoker who is 35 years old.
T or F - During a progressive ( graded) endurance- type exercise
bout,...

Cooperative Strategy" Please respond to the following: • From an
ethical perspective, determine how much information a firm is
obliged to tell a potential strategic alliance partner about what
it expects to learn from the cooperative arrangement. Explain your
rationale. e-Activity :Use the Internet to research two U.S.-based
companies you believe would mutually benefit from working together
in some way. Be prepared to discuss • From the e-Activity,
determine which type of cooperative strategy would most benefit the
two companies...

] A partial computer output from a regression analysis using
Excel’s Regression tool follows. Regression Statistics Multiple R
(1) R Square 0.923 Adjusted R Square (2) Standard Error 3.35
Observations ANOVA df SS MS F Significance F Regression (3) 1612
(7) (9) Residual 12 (5) (8) Total (4) (6) Coefficients Standard
Error t Stat P-value Intercept 8.103 2.667 x1 7.602 2.105 (10) x2
3.111 0.613 (11)

The table below is a correlation matrix from the multiple
regression you want to run.
x1
x2
x3
y
x1
1
x2
0.724724
1
x3
0.970725
0.794503
1
y
0.984868
0.611978
0.953998
1
A) Which independent variable has the strongest correlation to
the dependent variable?
a. x2
b. The table does not contain enough information to answer
that
c. x1
d. x3
B) What is the value of the correlation that indicates serious
multicollinearity?
a. 1
b. 0.970725
c. 0.953998...

The sketch of the following periodic function f(t)
given in one period,
f(t) = {(3t+1), -1 < t <= 1 and
0, -3 < t <= -1
a) Find period of the function, 2p?
b) Find Fourier coeff, a0, an (n
=>1), bn?
c) Fourier series representation of f(t)?
d) Result from (c), find the
first four non-zero term?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 2 minutes ago

asked 27 minutes ago

asked 34 minutes ago

asked 36 minutes ago

asked 36 minutes ago

asked 38 minutes ago

asked 48 minutes ago

asked 59 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago