In: Finance
Mean of stock price = 1117.64
STDEV (Population) = 67.61
If a person bought 1 share of Google stock within the last year, what is the probability that the stock on that day closed within $50 of the mean for that year (round to two places)? (Hint: this means the probability of being between 50 below and 50 above the mean).
If a person bought 1 share of Google stock within the last year, what is the probability that the stock on that day closed at less than $1050 per share (round to two places)? Would this be considered unusual? Use the definition that an unusual value is more than 2 standard deviations above or below the mean.
At what prices would Google have to close in order for it to be considered statistically unusual or statistically significant outliers? You will have a low and high value. There are several possible definitions for unusual in statistics, but for our project let's use the definition that an unusual value is more than 2 standard deviations above or below the mean.
In: Statistics and Probability
The length of time, in hours, it takes an "over 40" group of people to play one soccer match is normally distributed with a mean of 2.2 hours and a standard deviation of 0.55 hours. A sample of size n = 80 is drawn randomly from the population. Find the probability that the sample mean is between 2.1 hours and 2.4 hours.
In: Statistics and Probability
To what extent do syntax textbooks, which analyze the structure of sentences, illustrate gender bias? A study of this question sampled sentences from 10 texts. One part of the study examined the use of the words "girl," "boy," "man," and "woman." We will call the first two words juvenile and the last two adult. Is the proportion of female references that are juvenile (girl) equal to the proportion of male references that are juvenile (boy)? Here are data from one of the texts:
Gender n X(juvenile)
Female 60 47
Male 135 50
(a) Find the proportion of juvenile references for females and its standard error. Do the same for the males. (Round your answers to three decimal places.)
p̂F =
SEF =
p̂M =
SEM =
(b) Give a 90% confidence interval for the difference. (Do not use rounded values. Round your final answers to three decimal places.) ,
(c) Use a test of significance to examine whether the two proportions are equal. (Use p̂F − p̂M. Round your value for z to two decimal places and round your P-value to four decimal places.)
z =
P-value =
State your conclusion.
There is not sufficient evidence to conclude that the two proportions are different.
There is sufficient evidence to conclude that the two proportions are different.
In: Statistics and Probability
To what extent do syntax textbooks, which analyze the structure of sentences, illustrate gender bias? A study of this question sampled sentences from 10 texts. One part of the study examined the use of the words "girl," "boy," "man," and "woman." We will call the first two words juvenile and the last two adult. Is the proportion of female references that are juvenile (girl) equal to the proportion of male references that are juvenile (boy)? Here are data from one of the texts:
| Gender | n | X(juvenile) |
| Female | 62 | 47 |
| Male | 133 | 50 |
(a) Find the proportion of juvenile references for females and its standard error. Do the same for the males. (Round your answers to three decimal places.)
| p̂F | = _______ |
| SEF | = _______ |
| p̂M | = _______ |
| SEM | = _______ |
(b) Give a 90% confidence interval for the difference. (Do not use
rounded values. Round your final answers to three decimal
places.)
| _______, _______ |
(c) Use a test of significance to examine whether the two
proportions are equal. (Use p̂F −
p̂M. Round your value for z to two
decimal places and round your P-value to four decimal
places.)
| z | = | _______ |
| P-value | = | _______ |
State your conclusion.
There is sufficient evidence to conclude that the two proportions are different.
There is not sufficient evidence to conclude that the two proportions are different.
In: Statistics and Probability
L.V. is a 68-year-old male admitted to the coronary care unit 24 hours ago with an anteroseptal myocardial infarction (MI). His past medical history includes two other MIs within the last 5 years, obesity, hypertension, hyperlipidemia, and sleep apnea. L.V. had chest pain at home for 12 hours before seeking medical treatment. Lab results note troponin I at 5.2 mcg/L. L.V. is currently pain free with stable VS. The heart monitor shows sinus rhythm with occasional, unifocal premature ventricular contractions and a heart rate (HR) in the 90s. His blood pressure (BP) is 130/70, respiratory rate (RR) is 24 breaths/minute and O2 saturation is 93% on O2 via nasal cannula at 2 L/min. He has a heparin drip infusing at 1200 U/hr and IV nitroglycerin infusing at 20 mcg/min. You are assigned to care for L.V. as part of a two-patient assignment. Question 4: Unfortunately, L.V. quickly begins to deteriorate and displays symptoms of progressive cardiogenic shock. His BP is 84/50, HR 132, RR 30, temperature 36° C, and oxygen saturation 89% in spite of supplemental oxygen. As his health care provider is notified,
Which eight interventions should you be prepared to initiate?
In: Nursing
3. Pure expectations theory: Two-year bonds
Which of the following is consistent with the pure expectations theory of the yield curve? Check all that apply.
A flat yield curve suggests that the market thinks interest rates in the future will be the same as they are today.
A downward-sloping yield curve suggests that the market thinks interest rates in the future will be lower than they are today.
A flat yield curve suggests that the market thinks interest rates in the future will be higher than they are today.
A downward-sloping yield curve suggests that the market thinks interest rates in the future will be higher than they are today.
Brian would like to invest a certain amount of money for two years and considers investing in a one-year bond that pays 3 percent and a two-year bond that pays 7 percent. Brian is considering the following investment strategies:
| Strategy A: Buy a one-year bond that pays 3 percent and in year one, buy another one-year bond that pays the forward rate in year two. | |
| Strategy B: Buy a two-year bond, in year one, that pays 7 percent in the first year and 7 percent in the second year. |
If the one-year bond purchased in year two pays 7 percent, Brian will choose (STRATEGY A OR B)
.
Which of the following describes conditions under which Brian would be indifferent between Strategy A and Strategy B?
The rate on the one-year bond purchased in year two pays 11.155 percent.
The rate on the one-year bond purchased in year two pays 11.601 percent.
The rate on the one-year bond purchased in year two pays 12.047 percent.
The rate on the one-year bond purchased in year two pays 9.482 percent.
In: Finance
Alysha, a retired librarian, would like to donate some money to
her alma mater to endow a $3,000 annual scholarship. The first
scholarship will be awarded in 5 years. The university will manage
the funds and expects to earn 3 percent per year.
How much will Alysha have to donate so that the endowment fund
never runs out? (Round answer to 0 decimal places, e.g.
125. Do not round your intermediate
calculations.)
In: Finance
Sewage at a certain pumping station is raised vertically by 5.48 m at the rate of 1 850 000 liters each day. The sewage, of density 1 050 kg/m3, enters and leaves the pump at atmospheric pressure and through pipes of equal diameter.
(a) Find the output mechanical power of the lift station.
W
(b) Assume an electric motor continuously operating with average
power 4.10 kW runs the pump. Find its efficiency.
%
In: Physics
1) Describe the asset-liability time mismatch that all banks face.
2) Suppose that, in response to the threat of inflation, the Federal reserve bank runs contractionary policy. (2 points)
a)Will the Federal Reserve bank buy or sell treasuries to/from commercial banks? Explain.
b)What is the effect of this policy on the money supply? Explain.
c)What is the effect of this policy on interest rates? Explain.
d)What is the effect on this policy on aggregate demand? Explain.
In: Economics