1. Describe and briefly explain whether the following changes cause the short-run aggregate supply to

increase, decrease or neither:

a. The price level increases

b. Input prices decrease

c. Firms and workers expect the price level to fall.

d. The price level decreases

e. New policies increase the cost for businesses of meeting government regulations.

f. The number of workers in the labor force increases.

2. Describe and briefly explain whether the following changes cause the aggregate demand to increase,

decrease or neither:

a. The price level increases

b. Investment decreases

c. Imports increase and exports decrease

d. Consumer optimism improves

e. Government increases infrastructure spending

f. Stock market crashes.

3. Starting in early March of 2020, many factories, restaurants, offices and entertainment venues closed

their doors fearing the spread of Coronavirus. Using aggregate demand-aggregate supply model, predict

which curve this event mostly affects and what’s the impact on the US economy in the short-run?

4. From 2014 to 2018, dollar has been slowly falling against other major currencies.

a. Determine how the falling value of the dollar affects the US price level, real GDP and the

unemployment rate in both short-run and the long-run. You can assume that the economy was in the

long-run equilibrium before this change, and consider only the stated event. Place your answers in the

boxes below (using an up arrow, a down arrow, or a dash if the level is constant).

Short Run Long-Run

P Y u P Y u

b. Draw a diagram that supports your answers in part (a). Clearly label all the curves and equilibria as

well as show the direction of changes using arrows.

1.Comparing infrastructure finance with real estate mortgage finance, which of the following statement is not true?

a.Value of the underlying asset is the same to the creditor before and after default in real estate mortgage finance.

b.Value of the underlying asset is the same to the borrower before and after default in real estate mortgage finance.

c.Value of the underlying asset is the same to the creditor before and after default in infrastructure finance.

d.Value of the underlying asset is the same to the borrower before and after default in infrastructure finance.

2.What determines the value of a firm?

a.Asset value in the balance sheet

b.Revenue of the firm discounted at the firm’s cost of capital

c.Net cash flows of the firm discounted at the firm’s cost of capital

d.Liability plus equity minus tax expenditure

3.Which one of the following factors would not affect the cost of capital of an infrastructure project?

a.Market risk premium

b.Project cash flows

c.Project Risk profile

d.Financial structure (e.g. debt to equity ratio)

4.Which of the following tasks are involved in the development of infrastructure financial strategies?

a.Contract evaluation

b.Financial structure analysis

c.Risk analysis

d.Technical feasibility analysis

5.Which of the following is (or are) not true about off-balance finance?

a.Investor is limited liability to project loss

b.Investor’s risk profile is less affected by the project

c.Project’s debt to equity ratio has to be lower than the investor’s debt to equity ratio

d.Securitization of project revenue is not allowed in off-balance financing.

A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure (in millimeters of mercury) for nine patients before taking the new drug and 2 hours after taking the drug are shown in the table below. Is there enough evidence to support the company's claim? Let d = (blood pressure before taking new drug) − (blood pressure after taking new drug). Use a significance level of α = 0.05 for the test. Assume that the systolic blood pressure levels are normally distributed for the population of patients both before and after taking the new drug.

Patient 1 2 3 4 5 6 7 8 9

Blood pressure (before)

Blood pressure (after)

Step 1 of 5: State the null and alternative hypotheses for the test.

Step 2 of 5: Find the value of the standard deviation of the paired differences. Round your answer to one decimal place.

Step 3 of 5: Compute the value of the test statistic. Round your answer to three decimal places.

Step 4 of 5: Determine the decision rule for rejecting the null hypothesis H0. Round the numerical portion of your answer to three decimal places.

Step 5 of 5: Make the decision for the hypothesis test.

Question

1. For Matrix A = 4 12 3, if g (X) = X² +4X +2, what is the answer to g(A)?
2. Using algebra, find the solution to the system of inequalities below

                      y ≤ 5-3x

                y + 19 ≥ x² -8x       

3. What is peculiar about the slope of a function before and after a point of inflection as compared with the slope before or after a maximum or minimum point?

4. Suppose that the satisfaction received from a number of rides taken on a roller coaster is given by the function S(x) = 200 2x+13x+4^0.5 , where S is the satisfaction received and x is the number of rides taken.

5. Find the rate at which the satisfaction changes with respect to the number of rides taken

   Question

6. For Matrix A = 4 12 3, if g (X) = X² +4X +2, what is the answer to g(A)?
7. Using algebra, find the solution to the system of inequalities below

8.                       y ≤ 5-3x

                   y + 19 ≥ x² -8x       

                               

9. What is peculiar about the slope of a function before and after a point of inflection as compared with the slope before or after a maximum or minimum point?
11. Suppose that the satisfaction received from a number of rides taken on a roller coaster is given by the function S(x) = 200 2x+13x+4^0.5 , where S is the satisfaction received and x is the number of rides taken.
13. Find the rate at which the satisfaction changes with respect to the number of rides taken

Imagine that there are two markets for meals: sit-down restaurants and restaurants that focus on delivery and to-go meals.

a. Draw a supply-and-demand diagram that shows how the market for sit-down restaurants differs before and after COVID-19. Label each axis, the demand curve, the supply curve, the equilibrium price, and the equilibrium quantity. Then, show how the market for sit-down restaurants differs before and after COVID-19. Label the new equilibrium price and quantity. You can take a picture of your awesome supply and demand diagram and upload it or use software programs to draw your supply and demand diagram. Either way, you'll need to upload your diagram.

b. Draw a supply-and-demand diagram that shows how the market for delivery and to-go meals differs before and after COVID-19. Label each axis, the demand curve, the supply curve, the equilibrium price, and the equilibrium quantity. Then, show the market for delivery and to-go meals differs before and after COVID-19.  Label the new equilibrium price and quantity. You can take a picture of your awesome supply and demand diagram and upload it or use software programs to draw your supply and demand diagram.

c. Compare and contrast your two graphs. Which type of restaurant does well in the new economy? Which does worse? Why?

A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure (in millimeters of mercury) for nine patients before taking the new drug and 22 hours after taking the drug are shown in the table below. Is there enough evidence to support the company's claim?

Let d=(blood pressure before taking new drug)−(blood pressure after taking new drug). Use a significance level of α=0.01 for the test. Assume that the systolic blood pressure levels are normally distributed for the population of patients both before and after taking the new drug.

Step 1 of 5: State the null and alternative hypotheses for the test

Step 2 of 5: Find the value of the standard deviation of the paired differences. Round your answer to three decimal place.

Step 3 of 5: Compute the value of the test statistic. Round your answer to three decimal places.

Step 4 of 5: Determine the decision rule for rejecting the null hypothesis H0. Round the numerical portion of your answer to three decimal places.

Step 5 of 5: Make the decision for the hypothesis test. Reject or Fail to Reject.

A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure (in millimeters of mercury) for nine patients before taking the new drug and 2 hours after taking the drug are shown in the table below. Is there enough evidence to support the company's claim? Let d=(blood pressure before taking new drug)−(blood pressure after taking new drug). Use a significance level of α=0.05 for the test. Assume that the systolic blood pressure levels are normally distributed for the population of patients both before and after taking the new drug.

Patient 1 2 3 4 5 6 7 8 9

Blood pressure (before) 199 164 173 201 174 163 172 155 182

Blood pressure (after) 186 153 147 189 167 151 154 142 162

Step 1 of 5: State the null and alternative hypotheses for the test

Step 2 of 5: Find the value of the standard deviation of the paired differences. Round your answer to one decimal place.

Step 3 of 5: Compute the value of the test statistic. Round your answer to three decimal places.

Step 4 of 5: Determine the decision rule for rejecting the null hypothesis H0. Round the numerical portion of your answer to three decimal places.

Step 5 of 5: Make the decision for the hypothesis test. Reject or Fail to Reject

A pharmaceutical company claims that its new drug reduces systolic blood pressure. The systolic blood pressure (in millimeters of mercury) for nine patients before taking the new drug and 2 hours after taking the drug are shown in the table below. Is there enough evidence to support the company's claim? Let d=(blood pressure before taking new drug)−(blood pressure after taking new drug). Use a significance level of α=0.05 for the test. Assume that the systolic blood pressure levels are normally distributed for the population of patients both before and after taking the new drug.

Patient 1 2 3 4 5 6 7 8 9

Blood pressure (before) 153 159 197 164 185 162 158 196 166

Blood pressure (after) 146 142 180 145 177 142 146 176 146

Step 1 of 5 : State the null and alternative hypotheses for the test.

Step 2 of 5: Find the value of the standard deviation of the paired differences. Round your answer to one decimal place.

Step 3 of 5: Compute the value of the test statistic. Round your answer to three decimal places.

Step 4 of 5: Determine the decision rule for rejecting the null hypothesis H0. Round the numerical portion of your answer to three decimal places.

Step 5 of 5: Make the decision for the hypothesis test. Reject or Fail to Reject

Question 3:

a. In making an inference about a population, it is usually desirable to make a/an __________ estimate.

• sample
• standard
• average
• interval

b. If housing starts are always stronger in the spring and summer than during the fall and winter. This is a result of what type of data pattern?

• Cyclical
• Irregular
• Seasonal
• Trend

c. For the forecasting process, where would the model selection step fall in the process?

• After specifying the objectives and before determining what to forecast.
• After preparing the forecast and before presenting the forecast.
• After considering data and before evaluating the model.
• After identifying the time dimensions and before selecting the model.

d. Which one of the following statements is correct about statistical hypothesis testing?

• The approach is to see whether you find sufficient evidence to reject the null hypothesis.
• The approach is to see whether you find sufficient evidence to accept the alternative hypothesis.
• The approach is to see whether you find sufficient evidence to reject the alternative hypothesis.
• The approach is to see whether you find sufficient evidence to accept the null hypothesis.

e. How are the t-distribution and the normal distribution similar?

• They both are symmetrical.
• They both have the same concentration around the peak.
• They both work with sample data.
• They both have multiple peaks.

f. The t-test, F-test, Durbin-Watson, and chi-square are what kind of tests?

• Central tendency
• Statistical hypotheses
• Correlation
• Dispersion

1. n 2017, Nina contributes 11 percent of her $126,000 annual salary to her 401(k) account. She expects to earn a 10 percent before-tax rate of return. Assuming she leaves this (and any employer contributions) in the account until she retires in 25 years, what is Nina’s after-tax accumulation from her 2017 contributions to her 401(k) account? (Use Table 1, Table 2, Table 3, Table 4.) (Round your intermediate calculations and final answers to the nearest whole dollar amount. Round "Future value factor" to 4 decimal places.)

a. Assume Nina’s marginal tax rate at retirement is 30 percent.

b. Assume Nina’s marginal tax rate at retirement is 20 percent.

c. Assume Nina’s marginal tax rate at retirement is 40 percent.