The journey of me


Saturday, August 30, 2014

ECO201-3 First Try

To say that a particular good is non rival means that
consumption of the good by one person reduces the availability of the good to others.

The pattern in which insurance tends to be purchased disproportionately by those who are most costly for companies to insure, is called
Adverse selection.



dominated; dominated

One of the most efficient methods for dealing with the natural monopoly for fire protection is
All of the listed choices

One implication of the lemons model as applied to the used car market is that
a car with a price equal to its blue book value, without additional information, is likely to be a below average quality car.

A state-owned natural monopoly will have
no incentive to minimize cost

A feature of natural monopoly is economies of scale in production, which means
marginal cost will always be less than average total cost

Some people reduce their effort prevent their insured goods from being damaged or stolen. This behavior is known as
risk aversion

If both Macy and Gimble charge a high price, they each earn $200. If they both charge a low price, they each earn $100. If one charges a low price and the other a high price, the one who charges a low price will capture much of the market and earn $300, leaving the other with only $75. Which statement(s) is(are) correct regarding this situation?
I. Charging a high price is a dominant strategy for both.
II. This is a prisoners' dilemma in which both will end up earning less than they could if they successfully cooperated.
III. For maximum profit, these two sellers should cooperate, one charging a high price and the other charging a low price.
II only is correct.

There are 1,000 houses in Ardmore Park. Each house costs $300,000 and 1 percent of the houses are likely to be wiped out by floods and landslides. Scott Klein, an enterprising college graduate is considering starting an insurance agency to offer flood insurance policies. The policy will pay 60 percent of the purchase price of $300,000 if a homeowner's house is wiped out. Scott plans to charge an insurance premium of $80,000 per house. Suppose homeowners know with certainty which homes will be wiped out. Suppose Scott has no explicit costs other than paying claims filed by homeowners, what is his accounting profit? For simplicity, assume that homeowners are risk neutral.
He will not be in business because no one will purchase insurance.

To derive the market demand curve for a private good one sums the __________. For a public good, one sums the __________.
individual quantities at various prices; individual prices at various quantities

A good or service that is both highly nonrival and highly nonexcludable is termed a(n)
pure public good.

Which one of the following policies mitigates the negative effects of moral hazard?
Policies with large deductible provisions

Two firms produce homogeneous products, set price simultaneously, and end up in a Nash equilibrium in which price is equal to the competitive price. Which of the following describes this situation?
Bertrand homogeneous duopoly.


A Nash equilibrium with both players choosing strategy Z.


prisoner's dilemma because playing their dominated strategies would increase the players' payoffs.

Asymmetric information exists when
the seller knows more than the buyer.

Consider the following worker compensation schemes: 
I. a flat salary, 
II. seniority system, and 
III. a profit sharing scheme. 
Which scheme(s) is(are) likely to provide some control over managers who are the agents in an agency relationship with shareholders?
III only

Which statement(s) is (are) correct regarding collusion?
I. Both tacit and explicit collusion are expressly prohibited by the Sherman Act.
II. The greater the number of firms, the harder it becomes to sustain collusion.
III. Collusive agreements tend to be easier to maintain if firms can monitor their rivals' prices only imperfectly.
II only

The demand curve for public goods is constructed by
A summing each voter's reservation price for a given level of public good.

RESULTS: 65/100

ECO201-3 Second Try

Tim and Larry are both thrill seekers. Tim has health insurance and Larry does not. One can predict that
Larry will engage in fewer dangerous activities.

A state-owned natural monopoly will have
no incentive to minimize cost

Adverse selection in the labor market refers to a situation where
employers are able to observe certain qualities of potential workers and can decide on the basis of those qualities whether or not to hire that person.

One implication of the lemons model as applied to the used car market is that
a car with a price equal to its blue book value, without additional information, is likely to be a below average quality car.

Government regulators in Idaho set the price of electricity based on the explicit costs of the Electric Power company, then add an extra amount to assure a normal return of the firm's investment. This procedure is called
cost-plus regulation.

Moral hazard occurs when a person's behavior changes in ways that
increases the likelihood of an unfavorable outcome

The demand curve for public goods is constructed by
summing each voter's reservation price for a given level of public good.

Games in which players find that playing their dominant strategies results in a lower payoff than playing their dominated strategies is called
the prisoner's dilemma.

To derive the market demand curve for a private good one sums the __________. For a public good, one sums the __________.
individual quantities at various prices; individual prices at various quantities

Which one of the following policies mitigates the negative effects of moral hazard?
Policies with large deductible provisions.

A good or service that is both highly nonrival and highly nonexcludable is termed a(n)
A pure public good.

The games where playing the dominant strategies leads to a less desirable equilibrium is refer to as
prisoner's dilemma.

There are 1,000 houses in Ardmore Park. Each house costs $300,000 and 1 percent of the houses are likely to be wiped out by floods and landslides. Scott Klein, an enterprising college graduate is considering starting an insurance agency to offer flood insurance policies. The policy will pay 60 percent of the purchase price of $300,000 if a homeowner's house is wiped out. Scott plans to charge an insurance premium of $80,000 per house. Suppose homeowners know with certainty which homes will be wiped out. Suppose Scott has no explicit costs other than paying claims filed by homeowners, what is his accounting profit? For simplicity, assume that homeowners are risk neutral.
He will not be in business because no one will purchase insurance.

One of the most efficient methods for dealing with the natural monopoly for fire protection is
All of the listed choices

Which statement(s) is (are) correct regarding collusion?
I. Both tacit and explicit collusion are expressly prohibited by the Sherman Act.
II. The greater the number of firms, the harder it becomes to sustain collusion.
III. Collusive agreements tend to be easier to maintain if firms can monitor their rivals' prices only imperfectly.
None of the statements is correct.

This formula gives the most profitable quantity for firm A to produce, given the quantity produced by firm B. It is called_____
A's best response function.

If both Macy and Gimble charge a high price, they each earn $200. If they both charge a low price, they each earn $100. If one charges a low price and the other a high price, the one who charges a low price will capture much of the market and earn $300, leaving the other with only $75. Which statement(s) is(are) correct regarding this situation?
I. Charging a high price is a dominant strategy for both.
II. This is a prisoners' dilemma in which both will end up earning less than they could if they successfully cooperated.
III. For maximum profit, these two sellers should cooperate, one charging a high price and the other charging a low price.
I only is correct.

The government subsidizes public television and private companies own networks like CBS, ABC and NBC. From this you can infer that
public television broadcasts are public goods while broadcasts from the private networks are private goods.

Consider the following worker compensation schemes: 
I. a flat salary, 
II. seniority system, and 
III. a profit sharing scheme. 
Which scheme(s) is(are) likely to provide some control over managers who are the agents in an agency relationship with shareholders?
III only

Which of the following is not true of a Nash equilibrium in a game involving players A and B?
Both players must have dominant strategies.

RESULTS: 70/100

BUS105-3 Third Try

When fitting a linear regression, the dependent variable is the variable ____________. 
I. being observed from independent variables
II. being predicted or estimated from the independent variables
III. used to predict or estimate the independent variables
II only

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An increase of 1 sq ft is expected to decrease the price of the diamond by $0.01.

Which of the following statements is NOT a characteristic of Variance Inflation Factor (VIF)?
Higher VIF is preferred.

In a multiple regression equation Y= A + B1X1 + B2X2 + B3X3 + ... + BkXk, what is A?
A is the Y intercept in the population or the value of Y when all Xs are equal to 0

When discussing appropriate multiple regression analysis, which of the following is an assumption of multiple regression?
I.There is a linear relationship between dependent variable and the set of independent variables.
II.The variations in residuals are not the same for small and large values of predicted Y
III.The independent variables are correlated.

Which of the following statements is NOT a characteristic of coefficient of correlation?
Value near -1 indicates a strong direct or positive association between the variables.

What is the assumption of homoscedasticity? 
I.The variations around the regression equation is the same irrespective of the values of the independent variable.
II. The variations around the regression equation are different for different values of the independent variable but average to be zero.
III.The variations around the regression equation increases with increasing values of the independent variable.
What does a strong correlation imply?
I.A strong correlation implies that X the independent variable has no relationship with Y the dependent variable.
II. A strong correlation implies that X the independent variable has only a statistical relationship with Y the dependent variable. There is no causal relationship.
III.A strong correlation implies that X the independent variable has a casual relationship with Y the dependent variable.
II only

In a regression equation Y= A + BX, what is A?
A is the Y intercept in the population or the value of Y when X=0.

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There is strong positive correlation between the Price and the number of Carats in a diamond.

In a multiple regression, executing and deriving a significant Global (ANOVA) test indicates that ______________________________.
at least one of the independent variables is significant in explaining changes in the dependent variable

Which of the statement below best explains the coefficient of determination?
The coefficient of determination is the proportion of total variation in the dependent variable Y that is explained or accounted for by the variations in the independent variable X.

When discussing appropriate multiple regression analysis, which of the following is an assumption of multiple regression?
I.The variations in residuals are not the same for small and large values of predicted Y.
II. The independent variables are correlated.
III.The residuals are independent.
III only

What does the coefficient of correlation indicate?
The coefficient of correlation shows the direction and strength of the linear (straight line) relationship between two interval or ratio scale variables.

To interpret appropriately, a correlation coefficient of -0.85 would indicate a_______________________.
In a multiple regression, after executing and deriving an insignificant Global (ANOVA) test, you should then _______________.
conduct a t-test for each individual regression coefficient

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Low p-value indicates that variable SQFT is in the rejection zone and is significant explaining changes in price of property.

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Independent variable Store Area is not significant by itself and must be interpreted with Carats.

If multicollinearity is detected, which of the following should be the next step?
I.Increase the sample size and re-run the regression.
II. Re-run the regression with only the highly correlated independent variables.
III.Remove one of the highly correlated independent variables and re-run the regression.
III only

In a scatter diagram, points are plotted on __________________.
I. a X-Y diagram where X is the independent variable and Y is the dependent variable
II. a X-Y diagram where Y is the independent variable and X is the dependent variable
III.a line diagram where X is the variable measured and Y is the frequency
I only

RESULTS: 85/100

BUS105-3 Second Try

In a multiple regression, after executing and deriving a significant Global (ANOVA) test, you should then _______________.
conduct a t-test for each individual regression coefficient and identify significant variables

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There is strong positive correlation between the Price and the number of Carats in a diamond.

Which of the following statements is NOT a characteristic of Variance Inflation Factor (VIF)?
A VIF of less than 10 is unsatisfactory.

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the expected value of Y for a particular value of independent variable X which tends to be on the regression line

In a multiple regression, executing and deriving a significant Global (ANOVA) test indicates that ______________________________.
at least one of the independent variables is significant in explaining changes in the dependent variable

A 95% confidence interval of a predicted Y-value can be interpreted as __________________.
95% of the observed Y-values is expected to be within this confidence interval

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An increase of 1 SQFT is expected to increase the price of the property by $1.24.

In a regression equation Y= A + BX, what is A?
A is the Y intercept in the population or the value of Y when X=0

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A
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Low p-value indicates that variable Carats is in the rejection zone and is significant explaining changes in price of diamonds.

Demonstrate your essential knowledge in statistics by choosing a statement that does not describe a characteristic of coefficient of correlation.
When discussing appropriate multiple regression analysis, which of the following is an assumption of multiple regression?
I.There is a linear relationship between dependent variable and the set of independent variables.
II.The variations in residuals are not the same for small and large values of predicted Y
III.The independent variables are correlated.
I only

When describing a multiple linear regression equation Y= A + B1X1 + B2X2 + B3X3 + ... + BkXk, what is Bj?
Bj is the amount Y changes when Xj increases by 1 unit with all other independent variables are held constant

Which of the following statements is NOT a characteristic of Variance Inflation Factor (VIF)?
An independent variable with unsatisfactory VIF should not be removed from the model.

Which of the statement below best explains the coefficient of determination?
If multicollinearity is detected, which of the following should be the next step?
I.Increase the sample size and re-run the regression.
II. Re-run the regression with only the highly correlated independent variables.
III.Remove one of the highly correlated independent variables and re-run the regression.
When fitting a linear regression, the dependent variable is the variable ____________. 
I. being observed from independent variables
II. being predicted or estimated from the independent variables
III. used to predict or estimate the independent variables
II only

In a multiple regression, executing and deriving an insignificant Global (ANOVA) test indicates that _______________________________.
at least one of the independent variables is significant in explaining changes in the dependent variable

Which of the following statements is NOT a characteristic of coefficient of correlation?
In a multiple regression, after executing and deriving an insignificant Global (ANOVA) test, you should then _______________.
conduct a t-test for each individual regression coefficient

RESULTS: 90/100

Thursday, August 28, 2014

BUS105-3 First Try

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There is strong positive correlation between the Price in $ and the sq. ft. area of the property.

Which of the statement below best explains the coefficient of determination?
The coefficient of determination is the proportion of total variation in the dependent variable Y that is explained or accounted for by the variations in the independent variable X

To identify and fit a regression, which of the following is an assumption of linear regression?
I. For each value of X, there is a corresponding Y value. These Y values follow the normal distribution.II.The means of the Y normal distributions do not lie on the regression line.III.Y values are statistically dependent.I only
inlineImageLabel 38.bmpLow p-value indicates that variable Store Area is in the rejection zone and is significant explaining changes in price of diamonds.


In a regression equation Y= A + BX, what is A?A is the Y intercept in the population or the value of Y when X=0.
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Which statement below best describes autocorrelation?
Autocorrelation is a condition when successive residuals are correlated to each other over time.


When fitting a linear regression, the dependent variable is scaled on ________________.
the Y-axis of a X-Y graph


To interpret appropriately, a correlation coefficient of 0.85 would indicate a_______________________.
strong positive correlation


Which of the following statements is NOT a characteristic of coefficient of correlation?
Value near -1 indicates a strong direct or positive association between the variables.


Which of the statement below best describes residuals in a regression equation?
Residuals are the difference between the observed values of Y the dependent variables and the expected or predicted values of Y of the regression equation. 
In a multiple regression, after executing and deriving a significant Global (ANOVA) test, you should then _______________.
Which of the following statements is NOT a characteristic of Variance Inflation Factor (VIF)?
A A VIF of less than 10 is unsatisfactory.

Q To interpret appropriately, a correlation coefficient of -0.85 would indicate a_______________________.
When discussing appropriate multiple regression analysis, which of the following is an assumption of multiple regression?
I.The variations in residuals are not the same for small and large values of predicted Y.
II. The independent variables are correlated.
III.The residuals are independent.

RESULTS: 85 /100