Solution Of Assignment No.2 (Course STA301) Fall 2012

Solution Of Assignment No.2 (Course STA301) Fall 2012 

Question 1: 

A)The fourth mean moment of a symmetric distribution is 243. What would be the value of the standard deviation in order that the distribution may be meso-kurtic?

SOLUTION:-

Standard is equal to 2nd moment
We are that m4 = 243 . Therefore
m4 = 243
m4/m2 = b3 = 3  i.e   = 243/m2^2 = 3
or 243/3 = 81 or m2 = 9
Standard deviation is equal to m  2nd moment


B)Two candidates X and Y at the B.A (Hons.) Examination obtained the following data.

Candidate X Candidate Y   
 = 43.2 =        20.5   
S.D = 24.25   S.D = 15.6  
Which of the candidate showed a more consistent performance?
SOLUTION:-
By calculating the co-efficient of variation in each case.

Candidate A

C V = s/x * 100
C V = 24.25/43.2 * 100
C V = 56.13%

Candidate B

C V = s/y * 100
C V = 15.6/20.5*100
C V = 76.097%

We see that co­efficient of variation for the candidate A smaller than that for the
candidate B.Hence candidate A is more consistent than candidate B

Question 2:

A)If coefficient of skewness = 0, then what would you say about the shape of the distribution?

SOLUTION:-

For symmetric distributions or curves, the coefficient is zero. The shape is symmetric

B)The following data were computed from personnel records of a manufacturing firm:
             X = Number of years of service
            Y = weekly wage rate
          n = 23; ∑X = 2433; ∑Y = 4254, ∑   = 281019;   = 841786 and  = 482788
 If the correlation coefficient indicates that there does exist a relationship between X and Y,                                    compute the least squares line of regression Y = a + b X. 
SOLUTION:-
Where bxy = n (XY)-(X)(Y) / n (X^2)-(X)^2

bxy = 23(482788) (2433)(4254) / 23(281019) (2433)^2
bxy = 11104124-10349982 / 6463437-5919489
bxy = 754142/543948
b     = 1.3864
a     = y-bx

y   = ￥y/n = 

4254/23 = 

184.96

x  = 

￥x/n = 

2433/23 = 105.78

a = 184.96-1.39(105.78)

a = 184.96-147.0342

a = 37.92

Hence

y  = 37.92+1.39X

Is estimated regression equation appropriate for predicting the no

of years (x) given weekly wage rate

ECO402 Microeconomics Assignment 1 Solution Fall 2012

The Case:
Agriculture is the backbone of a number of economies, like Pakistan, India, China and others. The expansion of fertilizer’s production, mechanization and pesticides is considered as a significant factor to enhance the growth of agricultural sector in these countries. Here we will take the case of Pakistan.
Pakistan is a major exporter of rice and cotton. Suppose Pakistan is expecting bumper rice, cotton and sugarcane crops this year. By far, this situation will fluctuate price, demand and supply of these commodities in domestic and international market.
Hypothetical data of quantity supplied (Qs) and quantity demanded (Qd) of rice in domestic market and international market for two years is given
below.
  2010                                                          2011 
    Price          Qd                  Qs                 Price         Qd            Qs

(per kg)      (per kg)        (per kg)            (per kg)    (per kg)    (per kg)

Domestic market              20         1880              1780                  15            1910       1710
International market          21         4000              3450                  17            4050       7100

In the international market, the demand for rice is increasing day by day because of two main reasons, firstly population of the world is growing with 1.7% per year; secondly it is used as biofuel. The demand and supply equations of rice in domestic market are Qd = 2000- 6P and Qs = 1500 + 14P respectively. With the help of above data, solve questions given below.

Requirements:
a) Find the equilibrium price and equilibrium quantity of rice in domestic market.

b) How much quantity demanded of rice will be affected as a result of decrease in price of rice from Rs.20 to Rs.15 per kg in the domestic market? (Give your answer after calculating price elasticity of demand)

c) How much quantity supplied of rice will be affected as a result of decrease in price of rice from Rs.20 to Rs.15 per kg in the domestic market? (Give your answer after calculating price elasticity of supply)

d) If rice is not used in biofuel, how would this situation affect the price and quantity sold of rice in domestic market? Indicate graphically.                                                              (Marks = 5+5+5+5)

Solution: Coming Soon

ECO404 Mid term Old papers and Objective question

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Download Subjective Questions here.

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MTH302 Business Mathematics & Statistics Quiz 1 Solution Fall 2012

Today Quiz no.1

Question # 1 of 10 ( Start time: 09:34:32 PM )  Total Marks: 1

In tossing of a coin, the outcomes on successive trials are independent.

Select correct option:

 True

False

Question # 2 of 10 ( Start time: 09:35:15 PM )  Total Marks: 1

The correct formula for AND rule is

Select correct option:

 P(A and B)= P(A) P(B)        ok

P(A and B)= P(A)-P(B)

P(A and B)= P(A) + P(B)

None of these

 Question # 3 of 10 ( Start time: 09:36:28 PM )  Total Marks: 1

In binomial distribution, the experiment is repeated for

Select correct option:

 Variable number of times

Fixed number of times

Many number of times

None of these

 Question # 4 of 10 ( Start time: 09:37:54 PM )  Total Marks: 1

In the excel formulation for Poisson distribution i-e “POISSON(x,mean,cumulative)”, if ‘x’ or mean is non-numeric then it gives

Select correct option:

 #NUM!

#VALUE!

TRUE

FALSE

 Question # 5 of 10 ( Start time: 09:38:56 PM )  Total Marks: 1

If A and B are mutually exclusive events then,

Select correct option:

P(A or B) = P(A) + P(B) ok

P(A or B) = P(A) + P(B)-P(A and B)

P(A or B) = P(A) – P(B)

P(A and B) = P(A) +P(B)+ P(A or B)

 Question # 6 of 10 ( Start time: 09:40:20 PM )  Total Marks: 1

What is not a characteristic of poisson distribution.

Select correct option:

Either/or situation.

mean number of successes per unit,m,known and fixed.

p,chance unknown and large ok

None of these.

Question # 7 of 10 ( Start time: 09:41:31 PM )  Total Marks: 1

For normal distribution the probability of an event is zero if and only if value of ‘z’

Select correct option:

 Greater than 3

Less than 3

Equal to 3

None of these

Question # 8 of 10 ( Start time: 09:42:24 PM )  Total Marks: 1

A pair of dice is thrown, the probability of getting a total of 5 or 11 is

Select correct option:

 1/5

1/7

1/6

1/8

Question # 9 of 10 ( Start time: 09:43:34 PM )  Total Marks: 1

When two dice are rolled together, the outcomes on the faces are independent.

Select correct option:

 True

False

Quiz Start Time: 09:34 PM  Time Left  66

sec(s)

Question # 10 of 10 ( Start time: 09:44:11 PM )  Total Marks: 1

The probability of successes can be less than 0 or greater than 1.

Select correct option:

 True

False

 Another Quiz

Question # 1 of 10 ( Start time: 09:45:50 PM )  Total Marks: 1

Poisson probabilty density function has ____ parameter(s)

Select correct option:

 0

1

2

None of these.

Question # 2 of 10 ( Start time: 09:46:54 PM )  Total Marks: 1

In the excel formulation for Poisson distribution i-e “POISSON(x,mean,cumulative)”, ‘x’ is the

Select correct option:

 Expected numeric value

Logical value that determines the form of the probability distribution returned

Number of events over a specific time

Discrete non-random variable

Question # 3 of 10 ( Start time: 09:47:59 PM )  Total Marks: 1

An automatic production line breaks down every 2 hours.Special production requires uninterrupted operation for 8 hours.What is the probabilty that this can be achieved.

Select correct option:

 0.312

0.021

0.0183

None of these.

Question # 4 of 10 ( Start time: 09:48:27 PM )  Total Marks: 1

The successive binomial trials are assumed to be

Select correct option:

 Independent

Dependent

May be independent

None of these

Question # 5 of 10 ( Start time: 09:48:48 PM )  Total Marks: 1

When two dice are rolled together, the outcomes on the faces are independent.

Select correct option:

 True

False

Question # 6 of 10 ( Start time: 09:49:04 PM )  Total Marks: 1

The number of false fire alarms in a suburb of London on averages 4 per day. Assuming that a Poisson distribution is appropriate, the probability that 3 false alarms will occur on a given day is given by

Select correct option:

 P(X=3 ) = (4^3e^-3)/4!

P(X=3 ) =1- (4^3e^-3)/3!

P(X=3 ) = (4^3e^-4)/3

P(X=3 ) =1- (4^3e^-4)/4!

Question # 7 of 10 ( Start time: 09:49:48 PM )  Total Marks: 1

The Excel command “=BINOMDIST( 7, 4, 0.5, FALSE)” gives an error of #NUM. The reason is that number of successes is 7 which are greater than the trials which are 4.

Select correct option:

 True

False

Question # 8 of 10 ( Start time: 09:50:08 PM )  Total Marks: 1

For normal distribution the probability of an event is zero if and only if value of ‘z’

Select correct option:

 Greater than 3

Less than 3

Equal to 3

None of these

Question # 9 of 10 ( Start time: 09:50:31 PM )  Total Marks: 1

What is not a characteristic of poisson distribution.

Select correct option:

 Eiter/or situation.

mean number of successes per unit,m,known and fixed.

p,chance unknown and large

None of these.

 Question # 10 of 10 ( Start time: 09:50:43 PM )  Total Marks: 1

In the normal distribution curve, peak of the bell-shaped curve gives

Select correct option:

 Standard deviation

Variance

Mean

Frequency

 Another Quiz

Question # 1 of 10 ( Start time: 09:52:31 PM )  Total Marks: 1

In the excel formulation for Poisson distribution i-e “POISSON(x,mean,cumulative)”, if ‘x’ or mean is non-numeric then it gives

Select correct option:

 #NUM!

#VALUE!

TRUE

FALSE

 Question # 2 of 10 ( Start time: 09:53:24 PM )  Total Marks: 1

Which of the following is NOT applicable to a Poisson Distribution?

Select correct option:

 It is used to compute the probability of rare events.

Every event is independent of every other event.

The range for the number of events that could occur is 0,1,2,3, …

 Every event is dependent of every other event.

  

Question # 3 of 10 ( Start time: 09:54:34 PM )  Total Marks: 1

A single card is to be drawn from a well shuffled deck of cards. What will be the probability of black cards?

Select correct option:

 25/52

26/52

27/52

None of these

 Qestion # 4 of 10 ( Start time: 09:55:44 PM )  Total Marks: 1

The formula for the OR rule in probability theory is defined to be

Select correct option:

 P(A or B) = P(A) – P(B)

P(A or B) = P(A) + P(B)-P(A and B)

P(A or B) = P(A) + P(B)

P(A and B) = P(A) +P(B)+ P(A or B)

Question # 5 of 10 ( Start time: 09:56:41 PM )  Total Marks: 1

Formulation for Poisson distribution i-e “POISSON(x,mean,cumulative)” is truncated if ‘x’ is

Select correct option:

Non-integer

Integer

Integer but expected numeric value

Integer but non-expected value

Question # 6 of 10 ( Start time: 09:57:41 PM )  Total Marks: 1

The mean of a Poisson distribution is 5 while its standard deviation is 4.then what option is correct about this statement.

Select correct option:

 In some cases this result is possible.

Mean should be always less than standard deviation .

Mean and standard deviation are always equal.

Only  option 1 & 3.

Question # 7 of 10 ( Start time: 09:58:39 PM )  Total Marks: 1

When two coins are tossed, then probability that two heads are obtained is

Select correct option:

 1/2

1/3

1/4

1/5

 Question # 8 of 10 ( Start time: 09:59:42 PM )  Total Marks: 1

The Excel command “=BINOMDIST( 7, 4, 0.5, FALSE)” gives an error of #NUM. The reason is that number of successes is 7 which are greater than the trials which are 4.

Select correct option:

 True

False

  Question # 9 of 10 ( Start time: 10:00:18 PM )  Total Marks: 1

In binomial distribution, the experiment is repeated for

Select correct option:

 Variable number of times

Fixed number of times

Many number of times

None of these

 Quiz Start Time: 09:52 PM  Time Left  81

sec(s)

 Question # 10 of 10 ( Start time: 10:01:32 PM )  Total Marks: 1

When two dice are rolled together, the outcomes on the faces are independent.

Select correct option:

 True

False

CS201 Introduction to Programming Quiz 2 Fall 2012

MGT211 Introduction To Business Assignment 1 Solution Fall 2012

Corporate Social Responsibility
Learning objectives: Create awareness that how business decisions might affect the interests of stakeholder groups.
Case:
Corporate social, ethical and environmental awareness has become essential for businesses. Companies are liable to consider the interests of all stakeholders while performing their activities and making decisions. Business operations should not be exclusively focused to meet the objectives of shareholders and investors; which is the maximization of profit. Corporate must adopt a wider perspective when setting their objectives. The concept of corporate social responsibility explains us to assess the social impact of a business; it covers pollution levels, usage of energy, reprocessing and recycling rates, contributions to community, employee benefit programs and customer satisfaction. Business operations and decisions may have positive and negative impact on customers, employees, suppliers, community and environment.
Some typical business decisions in real world are as follows:
a) A business is planning for large expansion by building a new factory.
b) Application of technology into production and business processes
c) Business uses solar energy to run some operations.
Requirement:
Being the student of business education, you are required to analyze the likely positive and negative effects of these decisions on employees, customers and society at large (community).

PHY101 Physics Assignment 1 Solution Fall 2012

Question # 1
A football player kicks a football straight up in to the air with an initial velocity of 25m/s. What is the approximate maximum height that the ball reaches? Use acceleration due to gravity (g) as 9.8m/s2. Marks = 7
Question # 2
In the classic horse and cart problem, a horse is attached to a cart that can roll along on a set of wheels. Which of the following statement is true? Also explain the reason of your selected choice as well.
a) The horse pulls on the cart with a force, and the cart pulls, back on the horse with an equal force.
b) The horse pulls on the cart with a force greater than the force that the cart pulls back on the horse.
c) The horse pulls the cart forward because the force of friction forward is greater than the force of the wagon backward.
d) The horse pulls the cart forward, because of a time delay between the action and reaction forces.
e) The horse pulls the cart forward, but only if the horse has a mass greater than the mass of the cart. Marks = 6 (2+4)
Question # 3
Is it true to say that a projectile has zero acceleration at its peak? If yes explain if not give a reason. Marks = 4
Question # 4
(a)Anna is pushing but the box does not move. What is the force of static friction shown in below figure? Marks = 3
(b) What is the maximum static friction force shown in below figure? The coefficient of static friction for these materials is 0.31. Marks = 5

Solution Will Coming Soon

CS301 Data Structure Quiz 1 Fall 2012

Click To Download CS 301 fall 2012 Quiz NO 1

SOC101 Introduction to Sociology Assignment 1 Solution Fall 2012

On a cold winter day in 1983, a concerned socialworker paid a call to a farmhouse in rural Pennsylvania and found a five yearold girl hidden in a second floor storage room. The child, whose name was Susan, was stuck into an old chair with her arms tied above her head so that she could not move. She was dressed in only a few filthy garments, and her arms and legs were like matchsticks- so thin and weak that she could not use them. Due todomestic issues Susan was taken to a children’s home in a nearby city shortly after her birth. Susan’s mother was unable to pay for her care, so the child was moved from one’ stranger’s house to another for a period of several months. Finally, not yet six months of age, Susan was brought back tolive with her mother and grandfather.
At this point, Susan’s mother kept her in a room that resembled an attic, providing almost no attention and just enough milk to keep her alive. Because ofthe grandfather’s continuing hostility, Susan stayed in that room, with essentially no human contact, for five years. Susan did not speak, smile, laugh, or even show anger.
Keep in mind this case study and answer the following:
• Susan did not display any social characteristics that are commonly associated with human beings. How do you see the impact of this isolation on personality building of Susan? (5)

Answer:The impact of this isolation on personality building of Susan’s life is that she could not speak, smile, and laugh. Even she could not show her anger against hatred things or situation because she is an isolated girl. Also she couldn’t move because her arms and legs were immobile and at a halt.

• Critically analyze the reasons behind such apathetic condition of Susan. (5)

Answer: The reasons behind such apathetic condition of Susan were domestic issues. Her mother was not caring her. Nor she gives her (Susan) healthy food except milk. Susan was kept in a room that was being similar to garret. Her interaction with the society is negligible and this is a big reason in her isolation because the role of socialization in personality development is very important in one’s life.


• Do you think “Susan was an object rather than a person”? Justify with strong argument.(5)

Answer: I think, Yes “Susan was an object rather than a person” because she did not speak, smile, laugh, or even show anger. She could not use or move her hands, arms and legs because she is very weak.

ENG101 English Comprehension Solved Quiz No.1 Fall Semester 2012

ENG101 English Comprehension Solved Quiz No.1 Fall Semester 2012

Quiz Start Time: 06:53 PM

Time Left 89

sec(s)

Question # 1 of 10 ( Start time: 06:53:29 PM ) Total Marks: 1

1 - Read the word. Choose the option that gives the best meaning of the prefix or suffix in the given word. Playful

Select correct option

Without

Again

Filled with

Not

2 - The subject of the whole paragraph is called:

Select correct option:

Topic Sentence

Supporting Detail

Topic of a Paragraph

Main Idea

3 - What is the antonym of Phlegmatic?

Select correct option:

Invincible

Contemptible

Vivacious

Quiescent

4 - What is the antonym of Adulterate?

Select correct option:

Digress

Purify

Brandish

Applaud

5 - Fill in the blank with the correct spelling of the word from the given option. She was in _____ over her beautiful new dress.

Select correct option:

ecstacy

eckstacy

estasy

ecstasy

6 - Choose antonym for the word in capital letters. The new governor will FREE the innocent prisoner.

Select correct option:

imprisoned

release

imprison

costly

7 - How many vowel phonemes are there in English?

Select correct option:

44

20

8

5

8 - The words in heavy bold face at the top of the dictionary are known as:

Select correct option:

Root words

Guide words

Base words

Obsolete words

9 - A paragraph usually consists of;

Select correct option:

Main idea

Supporting details

Topic sentence

All of the above

10 - How many diphthong vowels are there in English?

Select correct option:

20

5

7

8

11 - All supporting sentences work together to support what?

Select correct option:

Thesis statement

The paragraph

The main idea

The elaboration

12 - Fill in the blank with the correct form of word. Yesterday, my girlfriend……….. visited me. I was surprised to see her.

Select correct option:

Unexpectedly

Expectation

Expectedly

Expected

13 - Fill in the blank with the correct spelling of the word from the given option. She was in _____ over her beautiful new dress.

Select correct option:

ecstacy

eckstacy

estasy

ecstasy

14 - Fill in the blank with the correct form of word. The…… dressed woman is my aunt.

Select correct option:

Attraction

Attractive

Attractively

Attract

15 - Read the word. Choose the option that gives the best meaning of the prefix or suffix in the given word. Playful

Select correct option:

Without

Again

Filled with

Not

16 - Fill in the blank with the correct form of word. The Olympics attract…………from all over the world.

Select correct option:

Competition

Competitors

Competitive

Competitively

17 - Read the word. Choose the option that gives the best meaning of the prefix or suffix in the given word. Remake

Select correct option:

Again

Not

Without

Less

18 - Choose the best option for the given statement. When the car crashed she was thrown against a cement wall ______ .

Select correct option:

violently

slowly

vehemently

seriously

19 - Find the word or phrase that best completes the sentence. As you pass the house, you’ll be able to see Mr Watson’s garden ___.

Select correct option:

on your right

on your right hand

to your right side

to your right handed side

20 - What is the antonym of Phlegmatic?

Select correct option:

Invincible

Contemptible

Vivacious

Quiescent