Question

QUESTION 24

True or False: Measurement error in the dependent variable causes
our beta-hat estimates to be biased.

True

False

2.5 points

QUESTION 25

True or False: Perfect multicollinearity means all independent
variables are uncorrelated with each other.

True

False

2.5 points

QUESTION 26

True or False: Statistical tools allow us to prove the null
hypothesis is wrong.

True

False

2.5 points

QUESTION 27

True or False: The coefficient on the interaction of a dummy
variable and a continuous variable indicates whether slope
associated with the continuous variable is different for the group
indicated by the dummy variable.

True

False

2.5 points

QUESTION 28

True or False: Type I errors occur when we fail to reject a null
hypothesis even when it is false.

True

False

2.5 points

QUESTION 29

True or False: Type II errors occur when we fail to reject a null
hypothesis even when it is false.

True

False

2.5 points

QUESTION 30

True or False: We can include a categorical variable (such as
region) in a multivariate model in the same way we include a
continuous variable.

True

False

2.5 points

QUESTION 31

True or False: We fail to reject the null hypothesis if the test
statistic is greater than the critical value.

True

False

2.5 points

QUESTION 32

True or False: We necessarily do not have an omitted variable bias
problem the omitted variable is uncorrelated with the included
variable.

True

False

2.5 points

QUESTION 33

True or False: When conducting analysis using categorical
variables, we include a dummy variable for every category covered
by the categorical variable.

True

False

Answer #1

24. Ans - False

Measurement error in the independent variable causes our beta-hat estimates to be biased not in dependent variable.

25. Ans - False

Perfect multicollinearity means all independent variables are linearly correlated with each other not uncorrelated.

26. True

Statistical tools allow us to prove the null hypothesis is wrong

27. Ans - True

28. Ans - False

This type is called type II error. Type II errors occur when we fail to reject a null hypothesis even when it is false not type I.

29. Ans - True

** we are only allowed to do 1st question, however i answer 6 questions> please post other questions separately**

QUESTION 30
True or False: We can include a categorical variable (such as
region) in a multivariate model in the same way we include a
continuous variable.
True
False
2.5 points
QUESTION 31
True or False: We fail to reject the null hypothesis if the test
statistic is greater than the critical value.
True
False
2.5 points
QUESTION 32
True or False: We necessarily do not have an omitted variable bias
problem the omitted variable is uncorrelated with...

QUESTION 33
True or False: When conducting analysis using categorical
variables, we include a dummy variable for every category covered
by the categorical variable.
True
False
QUESTION 34
We are analyzing the effects of regime type on corruption rates
with the following model: Corruption = 10 - 0.1 GDP (per capita) -
2.0Democracy where Corruption is an index of corruption, GDP (per
capita) is measured in thousands of dollars, and Democracy is a
dummy variable that is equal to one...

QUESTION 19
True or False: Adding more independent variables into the model
necessarily reduces bias.
True
False
2.5 points
QUESTION 20
True or False: By adding more independent variables into our OLS
model, we have a greater chance of getting rid of the endogeneity
that exists within the error term.
True
False
2.5 points
QUESTION 21
True or False: Given the model Income = β 0 + β 1 Parental income +
β 2 Male where Male is...

Indicate whether the following statement is true or false.
If we do not reject the null hypothesis, it is possible we have
made both type I and type II errors.
In an upper tail hypothesis test for the mean, the critical
value is 2.575 and the test statistic is 2.5. In this case, the
null hypothesis should not be rejected.
The calculated p-value should be divided by 2 to make the
decision for a two tail test.
The sampling error...

1.6 The percentage change in the Russell 2000 Index of the stock
prices of 2,000 small companies was +18.33% in 2004 and +4.55% in
2005. Compute the geometric rate of return and tick the correct
answer below.
a) Mean rate of return is 13.78%
b) Mean rate of return is 11.44%
c) Mean rate of return is 18.89%
d) Mean rate of return is 11.23%
1.7 Multiple regression allows us to use many different _______
variables to predict one _______...

True or False Questions
a. Suppose that (-0.47, -0.39) is a confidence interval for the
difference of proportions (p1 -
p2). This indicates that p1 is
greater than p2
b. If two variables are strongly correlated (r > 0.9 or r
< -0.9), we can say that the explanatory variable is causing the
response variable.
c. If two variables are negatively correlated this means that
when one increases the other tends to increase.
d. If p-value < ? then I...

Question 26: (Pt. 1) If our obtained/calculated positive
t value is greater than our critical positive t value,
we:
A. have made a Type II error
B. have made a Type I error
C. reject the null hypothesis
D. retain the null hypothesis
(Pt. 2) If we reject the null hypothesis when in reality
the null hypothesis is true, we have:
A. made a Type 2 error
B. made a Type 1 error
C. made the correct decision
D. none...

Question 1 : The answers listed below are characteristics of a
Type I error EXCEPT for one. Select the characteristic that is not
for Type I error
a) upsetting status quo for falsehood
b) a 'missed opportunity'
c) reject null hypothesis with null is true
question 2: The answers listed below are characteristics of a
Type II error EXCEPT for one. Select the characteristic that is not
for Type II error
a) do not reject null hypothesis when it is...

True/False
___ Poisson regression is used when a count variable is
regressed onto a set of continuous and/or categorical
predictors.
___ Ranks are never considered preferable to the actual
data.
___ When using a parametric test if two groups have identically
skewed distributions with the same variance, then any differences
would be due to differences in location.
___ A rank-based test may be considered a robust alternative
because it is testing a null hypothesis similar in concept to the
parametric...

Please answer True or False for the following statements:
1.) The question "do more than 40% of bird owners own cats"
leads to a two-tailed test?
2.) The graph of the normal distribution is perfectly
symmetrical, or a mirror image about the mean.
3.) In hypothesis testing, the alternative or motivated
hypothesis is assumed to be true.
4.) Type 1 error is the error we make in failing to reject the
null hypothesis.
5.) For a normal curve, about 95%...

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