Question

You can estimate average causal effects even if you cannot observe any individual causal effects. Is this statement true? Why? Justify your answer.

Answer #1

The fundamental problem of causal inference is the fact that
one can only observe one outcome under one condition, not under
both conditions simultaneously. The fundamental
problem notwithstanding, even if you cannot observe whether
variable X causes outcome Y in any given individual, it can still
be possible to figure out if variable X causes outcome Y on
average. What two assumptions are necessary to make this
claim?

In a particular cell you cannot detect any protein product, even
though there many mRNA copies of this gene present in the
cytoplasm. Which part of the gene is likely mutated?
A. Ribosome binding site of the 5' UTR of the mRNA
B. Promoter sequence of the DNA
C. microRNA cognition site of the 3' UTR of the mRNA
D. Poly-adenylation signal of the 3'UTR of the mRNA
E. enhancer site of the DNA

You observe a portfolio for five years and determine that its
average return is 11.8%
and the standard deviation of its returns in 19.8%.
Would a 30% loss next year be outside the 95% confidence
interval for this portfolio?
The low end of the 95% prediction interval is _____% (Enter
your response as a percent rounded to one decimal place.)
(Enter your response as a percent rounded to one decimal
place.)
A.Yes, you can be confident that the portfolio will...

3. Suppose you are trying to estimate the impact of doctor’s
visits on health.
(a) You attempt to estimate in the following way Health = ?0 +
?1Doctor’s visits + E ( E= disturbance term) Where the doctor’s
visits variable is the number of visits in the last 12 months. Do
you believe this estimate will be an accurate measurement of the
effect of an additional doctor’s visit on health? If not will it be
an over estimate or an...

4. You can only observe individuals’ __________ and try to
explain and predict their behavior based on your
understanding of the OB foundations.
a.personality
b.attitudes
c.emotions
d.actions
5. Self-efficacy is another name for __________.
a.self-confidence
b.self-image
c.self-talk
d.self-esteem
6.The way to improve your self-confidence and self-esteem is to
change your thoughts through __________.
a.self-esteem
b.self-confidence
c.self-image
d.self-talk
7. Which of the following traits reflects the belief that the
ends can justify the means?
a.
Locus of control
b.
Risk propensity...

An administrator for a hospital wished to estimate the average
number of days required for inpatient treatment of patients between
the ages of 25 and 34. A random sample of 500 hospital patients
between these ages produced a mean and standard deviation equal to
5.4 and 3.1 days, respectively. Assume that ages of patients are
normally distributed.
(a) Construct a 95% confidence interval for the mean length of
stay for the population of patients from which the sample was
drawn....

8. How smart are you really? An online IQ test is claiming that
it can estimate your IQ accurately.
You decide to take the test 25 times in a row. From your 100 tests,
you get an average IQ of 105
with a sample standard deviation of 20. You know that the true
average IQ score is 100. Based on
your sample, test the claim that the average IQ for people is more
than 100. Use a 0.01 level.

You observe the following market interest rates, for
both borrowing and lending:
One-year rate = 5%
two-year rate = 6%
one-year rate one year from now = 7.25%
How can you take advantage of these rates to earn a riskless
profit? Assume that the Pure Expectation Theory for interest rates
holds.
2. “If bonds of different maturities are close
substitutes, their interest rates are more likely to move
together.” Is this statement true, false, or uncertain? Explain
your answer.

Give an example of an interval estimate of an average
or proportion you may use in your daily life. For instance, you may
say that you are pretty sure your average commute time is between
25-30 minutes, or you are fairly confident that between 60-65% of
the population love dogs. Collect some data to see how well your
intuition is working. First, does your sample data meet all
assumptions necessary to construct the confidence interval of the
type you need?...

QUESTION 3
“Managers should drop any product line that reports an operating
loss.”
Indicate whether you agree or disagree with this statement. Explain
and justify your answer.

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