Saturday, February 6, 2010

STA630 Research Method, Assignment No. 1

SOLUTION:


In this scenario,following threats to internal validity exist:


History effects

In the scenario above , Pakistan television program was the history effect which was an external even out of control of management.All the employees take much interest in that program due to which the validity of the training influence adversely.


Maturation effect

In the scenario above , the length of time was too much according to some employees .And 3 employees left the training due to the fact that they were getting bored from training program..Thats why this threat to internal validity exist in scenario.


Testing effect

This effect also exist in this scenario ,As the questions asked in pretest influence the performance of employees adversely.


Instrumentation effect

This is another threat to internal validity which exist in this scenario.


Mortality

Mortality effect of threat to the internal validity exist I this scenario , as some of the employees left organization during program .Which contaminate the program because leaving of some members hinder the training process and make it difficult to intreprete the exact result.

Following threats to internal validity does not exist in the scenario above.


Selection bias effect

This is the threat which exist due to non random selection of subjects for 2 comparison groups.Whereas in scenario above members of 2 groups were selected randomly.So, there was no selection differentiation in scenario.

by VUsolutions..
.............................................

Semester Fall 2009

Research Methods (STA630)

Assignment No. 1

Last Date of Submission:

Wednesday, 10th February, 2010.

Marks: 15

Make sure that you upload the solution file before due date. No assignment will be accepted through e-mail after the due date.

Formatting guidelines

1. Use the font style “Times New Roman” and font size “12”.

2. It is suggested to compose your document in MS-Word

3. Use black and blue font colors only.

Solution guidelines

Your solution must not exceed Two (2) pages

The student will work individually and has to write in the form of

an analytical assignment.

Give the answer according to question, there will benegative

marking

for irrelevant material.

Mention the source (bibliography) which you are using for

preparing your assignment.

Please note that your assignment will not be graded if:

It is submitted after due date

The file you uploaded does not open

The file you uploaded is copied from someone else.

It is in some format other than .doc

Cheating or copying of assignment is strictly prohibited. The

cheated or copied assignment will be marked as Zero.

Assignment

# 01

Marks: 15

Last Date of Submission:

Wednesday, 10th February, 2010.

Scenario

A well known investing company of Pakistan hired a number of new employees. For the sake of their training they selected two methods. One method was to introduce them with the practical work and show them the real picture of the stock exchange, how it worked. The second method was to train them through classroom training. To see the effectiveness of each method they randomly selected the new employees for each type of training. Before that they had filled out an initial questionnaire with little difficulty level to see the previous knowledge, the employees had about the stock exchange. They assigned 10 employees for each type of training. Meanwhile Pakistan television started a new program for investors. All the new employees took keen interest in that program. During the training two employees from the first ***** and one from the second ***** left the organization. Some of the employees felt that the training program was quite lengthy. After the training, organization conducted a second questionnaire with a higher difficulty level than the previous one. The employees showed the same results.

Questions:

In this scenario, whether the following threats to internal validity exist? Why or why not, support your answer with logic.

A.

History effects

B.

Maturation effect

C.

Testing effect

D.

Instrumentation effect

E.

Selection bias effect

F.

Statistical regression

G.

Mortality


by VUsolutions

STA630 Research Method, Assignment No. 1

SOLUTION:


In this scenario,following threats to internal validity exist:


History effects

In the scenario above , Pakistan television program was the history effect which was an external even out of control of management.All the employees take much interest in that program due to which the validity of the training influence adversely.


Maturation effect

In the scenario above , the length of time was too much according to some employees .And 3 employees left the training due to the fact that they were getting bored from training program..Thats why this threat to internal validity exist in scenario.


Testing effect

This effect also exist in this scenario ,As the questions asked in pretest influence the performance of employees adversely.


Instrumentation effect

This is another threat to internal validity which exist in this scenario.


Mortality

Mortality effect of threat to the internal validity exist I this scenario , as some of the employees left organization during program .Which contaminate the program because leaving of some members hinder the training process and make it difficult to intreprete the exact result.

Following threats to internal validity does not exist in the scenario above.


Selection bias effect

This is the threat which exist due to non random selection of subjects for 2 comparison groups.Whereas in scenario above members of 2 groups were selected randomly.So, there was no selection differentiation in scenario.

by VUsolutions..
.............................................

Semester Fall 2009

Research Methods (STA630)

Assignment No. 1

Last Date of Submission:

Wednesday, 10th February, 2010.

Marks: 15

Make sure that you upload the solution file before due date. No assignment will be accepted through e-mail after the due date.

Formatting guidelines

1. Use the font style “Times New Roman” and font size “12”.

2. It is suggested to compose your document in MS-Word

3. Use black and blue font colors only.

Solution guidelines

Your solution must not exceed Two (2) pages

The student will work individually and has to write in the form of

an analytical assignment.

Give the answer according to question, there will benegative

marking

for irrelevant material.

Mention the source (bibliography) which you are using for

preparing your assignment.

Please note that your assignment will not be graded if:

It is submitted after due date

The file you uploaded does not open

The file you uploaded is copied from someone else.

It is in some format other than .doc

Cheating or copying of assignment is strictly prohibited. The

cheated or copied assignment will be marked as Zero.

Assignment

# 01

Marks: 15

Last Date of Submission:

Wednesday, 10th February, 2010.

Scenario

A well known investing company of Pakistan hired a number of new employees. For the sake of their training they selected two methods. One method was to introduce them with the practical work and show them the real picture of the stock exchange, how it worked. The second method was to train them through classroom training. To see the effectiveness of each method they randomly selected the new employees for each type of training. Before that they had filled out an initial questionnaire with little difficulty level to see the previous knowledge, the employees had about the stock exchange. They assigned 10 employees for each type of training. Meanwhile Pakistan television started a new program for investors. All the new employees took keen interest in that program. During the training two employees from the first ***** and one from the second ***** left the organization. Some of the employees felt that the training program was quite lengthy. After the training, organization conducted a second questionnaire with a higher difficulty level than the previous one. The employees showed the same results.

Questions:

In this scenario, whether the following threats to internal validity exist? Why or why not, support your answer with logic.

A.

History effects

B.

Maturation effect

C.

Testing effect

D.

Instrumentation effect

E.

Selection bias effect

F.

Statistical regression

G.

Mortality


by VUsolutions

Friday, February 5, 2010

THANKS for contineous TRUST

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Please feel free to comments on this offer, all type of comments will highly be appreciated and responded.



BEST OF LUCK



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VUsolutions

THANKS for contineous TRUST

Dear Students,

Thanks for your TRUST and continuous appreciation. We feel proud whenever we look at the visiting students ratio of our blog i.e. almost 10,000 visitors/students per day and we received more than 3500 emails daily.



We feel very happy to inform you that our updater service (update on Cell Phone) is going very successful and have more than 20500 cell numbers in our UPDATER service book.



Dear students, if you are away from your computer (PC) and want to keep in touch with our blog anyway, just email us your mobile/cell/Vfon number at "virtual.uni.help.updater@gmail.com". We 100% keep you in-touch with our website (www.VUsolutions.blogspot.com).



Please feel free to comments on this offer, all type of comments will highly be appreciated and responded.



BEST OF LUCK



VU Help Desk..

VUsolutions

ECO402 - Assignment No. 2 solution

A.

If we examine the market for rice in Pakistan during the year 2007 and 2009, the demand of rice was higher in the year 2007 but it fell down during the year 2009, due to the drop in the export demand of rice. But the Government wants to keep the price of rice at higher level. The given equations show the quantity demanded and quantity supplied of rice during the year 2007.

Year 2007: Demand: Qd = 1,600 - 125P

Year 2007 Supply: Qs = 440 + 165P

a. Calculate the market clearing price level and quantity in the year

2007, in that year there were no effective limitations on the

production of rice.

...........................................

Market clearing price condition

Quantity demanded = Quantity supplied

1600-125p = 440+165p

1600-440 = 165p+125p

1160 = 290p

P = 1160/290

Now: P = 4

Now putting values in the quantity demanded side or supply side

We are putting values in the quantity demanded side

Qd = 1600-125p

= 1600-125(4)

Qd = 1100

b. Why the government wants to keep the price at higher level i.e. to

$5.50 when there is decline in export demand. Will it effect on the

quantity demanded or quantity supplied equation and curve and how

much?

Yes it has effect on quantity demanded or quantity supplied.

Qd = 16, 00 – 125($5.50)

Qd =16, 00 – 687.5

Qd = 912.5

Quantity demanded is equal to Qd = 912.5

Qs = 440 +165($5.50)

Qs = 440 + 907.5

Qs= 1347.5

Quantity supplied is equal to Qs = 1347.5 Ans

c. Now with the help of new quantity equation calculate what should be

the quantity of rice which the government must buy?

Now

Excess supply = Qd –Qs

= 912 .5 -1345.7

= -435

The government will buy Q = 435

B.

Suppose a profit-maximizing monopolist is producing 800 units of output

and is charging a price of $70 per unit.

If the marginal cost of last unit produced is 50 what will be the elasticity of

demand for the product?

P = 70$ , MC = 50

P =MC/1+ (1/Ed) 70=50

We find “Ed”

P - MC = 1/Ed

70 – 50 = 1/Ed

20 = 1/Ed

Ed (20) = 1

Ed = 1/20


by VUsolutions

ECO402 - Assignment No. 2 solution

A.

If we examine the market for rice in Pakistan during the year 2007 and 2009, the demand of rice was higher in the year 2007 but it fell down during the year 2009, due to the drop in the export demand of rice. But the Government wants to keep the price of rice at higher level. The given equations show the quantity demanded and quantity supplied of rice during the year 2007.

Year 2007: Demand: Qd = 1,600 - 125P

Year 2007 Supply: Qs = 440 + 165P

a. Calculate the market clearing price level and quantity in the year

2007, in that year there were no effective limitations on the

production of rice.

...........................................

Market clearing price condition

Quantity demanded = Quantity supplied

1600-125p = 440+165p

1600-440 = 165p+125p

1160 = 290p

P = 1160/290

Now: P = 4

Now putting values in the quantity demanded side or supply side

We are putting values in the quantity demanded side

Qd = 1600-125p

= 1600-125(4)

Qd = 1100

b. Why the government wants to keep the price at higher level i.e. to

$5.50 when there is decline in export demand. Will it effect on the

quantity demanded or quantity supplied equation and curve and how

much?

Yes it has effect on quantity demanded or quantity supplied.

Qd = 16, 00 – 125($5.50)

Qd =16, 00 – 687.5

Qd = 912.5

Quantity demanded is equal to Qd = 912.5

Qs = 440 +165($5.50)

Qs = 440 + 907.5

Qs= 1347.5

Quantity supplied is equal to Qs = 1347.5 Ans

c. Now with the help of new quantity equation calculate what should be

the quantity of rice which the government must buy?

Now

Excess supply = Qd –Qs

= 912 .5 -1345.7

= -435

The government will buy Q = 435

B.

Suppose a profit-maximizing monopolist is producing 800 units of output

and is charging a price of $70 per unit.

If the marginal cost of last unit produced is 50 what will be the elasticity of

demand for the product?

P = 70$ , MC = 50

P =MC/1+ (1/Ed) 70=50

We find “Ed”

P - MC = 1/Ed

70 – 50 = 1/Ed

20 = 1/Ed

Ed (20) = 1

Ed = 1/20


by VUsolutions