gokhale model paper 3 doubts ..plz help

[k]

Q1)Which of the following statements is correct for a profit-maximizing firm? Total Revenue
greater than or equal to Total Cost is
a) Necessary but not sufficient c) Necessary and sufficient
b) Sufficient but not necessary d) Neither necessary nor sufficient
 
 Q2)Which of the following measure will remains unchanged when every observation in the data
set is divided by the same quantity?
a) Quartile deviation c) Coefficient of Variations
b) Standard Deviation d) Mode
 
Q3)If the correlation between two variables is -1 and 0, then the covariance between them is
a) Positive c) Zero
b) Negative d) None of all  

Q4)The data on GDP, unemployment, household expenditure are example of
a) Experimental data c) Cross – sectional data
b) Non – experimental d) Time series data

[k]

 Q)  What is the number of degrees of freedom for a simple bivariate linear regression with 100
observations?
a) 100 c) 98
b) 97 d) 2

[Masterpiece]

CONTENTS DELETED

The author has deleted this message.

[Xiang]

q3- b

[laracroft]

1-A
2-B
3-?
4-D

Hey Xiang can u explain the third one here ...
:)

[Diksha]

Q24. For children between the ages of 18 months and 29 months, there is approximately a linear
relationship between “height” and “age”. The relationship can be represented by: Y = 64.93
+ 0.63(x), where Y represents height (in centimeters) and X represents age (in months).
Joseph is 22.5 months old and is 80 centimeters tall. What is Joseph’s residual?
a) 79.1
b) -0.9
c) +0.9
d) 56.6

Is the answer (c)??

[Xiang]

first of all i think there is something wrong with this question. how can correlation be 2 no.s :/ then whats the point of correlation. i just solved using -1 . so the viability of my answer is not known. HEHE

[laracroft]

YUPP answer is C
:)

[Sumit]

1.a)
2.d)
3.b)
4.b)

[k]

thanx to all...
 u all r really helpful

[madhur1987]

15. A monopolist practicing third degree discrimination faces the following demand functions in
the two markets:
P1 = 100 – 0.5 Q1 and P2 = 100 – 4 Q2
while he faces a constant marginal cost of production (Pi and Qi refer to price and quantity in
market i). Profit maximization will imply
a) P1 > P2 c) P1 = P2
b) P1 < P2 d) Relation between P1 and P2 cannot be
determined without knowing the exact
cost function

[k]

its p1=p2
MC =0
IN THIRD DEGREE MR1=MR2=MC
so find q1 and q2 ...put in func
you will get p1=p2

[laracroft]

Hey Sumit , could you plz explain how you got these answers ?? :)

[Target MA]

plz explain q2

[Ayushya Kaul]

I think answer to the 4th one should be B) Cross-sectional Data.

[Do bats eat cats?]

For q2, shouldn't the answer be (c) coefficient of variation? It is the only unitless measure given in the options.

For q4, I think the answer should be (d) time series data. Data on GDP, unemployment and household expenditures are all collected over different time periods.

Also, I would really appreciate help with the third question.