Explain why variances could be misleading to managers. Differences
are not always bad...or are they? What are some measures that you
might suggest to control costs?
What is the best point estimate for the population's variance if
the sample standard deviation is 3.7? Round your answer to one
decimal place, if necessary.
In a one-way analysis of variance problem, explain what the
estimate of the variance of individual measurements (i.e.
quirkiness of the people or error)?
Using the data set from the previous question
(scatterplot.xlsx).
With the data point with the smallest x value removed, the
scatter plot now suggests a ________ ["nonlinear"
OR "linear"]
relationship between the dependent and independent
variables.
Data:
x
y
45
2358
56
4204
26
287
54
3849
24
925
23
3273
34
-678
45
3748
47
2898
43
1974
32
226
We use sample data to estimate population parameters and point
estimate and interval estimate are two typical tools of such
estimation.
Please discuss them answering the following questions.
1) Briefly discuss about how point estimate and confidence
interval are different to each other.
2) Discuss about way(s) to secure unbiased and efficient point
estimators.
3) Discuss about the effects of confidence level (or, Z-score)
and sample size on the width of confidence interval. Is it good or
bad to have...
Using the concept of "carry trade," explain how a decrease in
U.S. interest rates could affect the EUR/USD exchange rate. Given
this change in exchange rate, how would firms and customers be
affected?
Using the concept of "carry trade," explain how a decrease in
U.S. interest rates could affect the EUR/USD exchange rate. Given
this change in exchange rate, how would firms and customers be
affected?
References to verify answer
If the sample size is small, the estimation results might be
misleading. Why?
Explain the diferences between Statistically significant VS
economically important.
How to use p-value in making a rejection decision?
How to interpret the 95% CI for the hypothesis test of H_0:
β_j=0 against H_1: β_j≠0?
True or false: “If (β_j ) ̂ is outside CI, then we reject the
null hypothesis.”
How can we test H_0: β_1=β_2 against H_1: β_1≠β_2?