A sociologist is interested in the relation between x = number of job changes and y = annual salary (in thousands of dollars) for people living in the Nashville area. A random sample of 10 people employed in Nashville provided the following information.
| x (number of job changes) | 4 | 3 | 6 | 6 | 1 | 5 | 9 | 10 | 10 | 3 |
| y (Salary in $1000) | 35 | 37 | 36 | 32 | 32 | 38 | 43 | 37 | 40 | 33 |
In this setting we have Σx = 57, Σy = 363, Σx2 = 413, Σy2 = 13,289, and Σxy = 2137.
(a)Find Se. (Round your answer to three decimal places.)
(b) Find a 90% confidence interval for the annual salary of an individual with x = 5 job changes. (Round your answers to two decimal places.)
1) lower limit
2) upper limit
(c) Test the claim that the slope β of the population least-squares line is positive at the 5% level of significance. (Round your test statistic to three decimal places.) t =
(l) Find a 90% confidence interval for β and interpret its meaning. (Round your answers to three decimal places.)
1) lower limit
2) upper limit
In: Statistics and Probability
What are the changes that the ovaries and the uterus undergo during the female reproductive cycle
In: Biology
Identify and explain, if and how the new changes of IFRS 9
introduced by the standards can prevent
(or resolve) the problems (financials) inherent within the banking
industry.
In: Accounting
What are some of the industry-wide changes responsible for the evolution of management contracts?
In: Finance
What are some of the industry-wide changes responsible for the evolution of management contracts?
In: Finance
A stock trader at a brokerage firm has noticed that price changes in the shares of Summer House Bakery each trade are dependent upon the previous trade's price change. Her observations can be summarized by the following transition matrix. (We are assuming +1/8, 0, -1/8 are the only possible price changes for this stock).
|
Next Price Change |
||||
|
Most Recent Price Change |
+1/8 |
0 |
-1/8 |
|
|
+1/8 |
.7 |
.2 |
.1 |
|
|
0 |
.3 |
.4 |
.3 |
|
|
-1/8 |
.2 |
.1 |
.7 |
|
A) Provide a system of equations to find the long run behavior of the stock’s price changes.
B) Find the long run probability corresponding to each price change state.
In: Statistics and Probability
7. The depth of water in a bay changes due to the tide. On one particular day, the depth can be modeled by ? = 6 cos (2π/11) + 7, where ? is hours since midnight, and ? is depth in metres.
a) Calculate the depth of the water at midnight.
b) At what rate is the depth changing at 4:00 a.m.?
c) At what time, between midnight and noon is the water level rising fastest?
In: Math
how can this pandemic changes the global economic flow or the oil flow?
In: Economics
Explain why and how a company's performance on the stock market is driven by changes in the stock market expectations, not just by the company's actual performance.
In: Finance
The time taken by the multiplier process to act on changes in aggregate expenditures and affect the economy is part of the
|
a. |
effectiveness lag. |
|
|
b. |
recognition lag. |
|
|
c. |
transmission lag. |
|
|
d. |
decision making lag. |
Suppose a bank has $500,000 in deposits, a required reserve ratio of 20%, and reserves of $125,000. Then this bank has excess reserves of
|
a. |
$375,000. |
|
|
b. |
$125,000. |
|
|
c. |
$100,000. |
|
|
d. |
$25,000. |
An expansionary monetary policy ____ the money supply, causing the real interest rate to ___ and planned investment to ___
|
a. |
increases, increase, increase. |
|
|
b. |
increases, increase, decrease. |
|
|
c. |
decreases, increase, decrease. |
|
|
d. |
increases, decrease, increase. |
If the economy turns down and as a result more people become unemployed and receive unemployment compensation, this is an example of
|
a. |
discretionary expansionary fiscal policy. |
|
|
b. |
automatic expansionary fiscal policy. |
|
|
c. |
discretionary contractionary fiscal policy. |
|
|
d. |
automatic contractionary fiscal policy. |
In: Economics