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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'STATISTICAL ASSISTANT GR II -ECONOMICS AND STATISTICS' And exam conducted in the year 2015. And Question paper code was '005/2015/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.

page: 4 out of 8

Home Page

4 of 8

7

Correct Answer:- Option-A

http://192.168.1.6/psc/modules/marklist/answer_sheet/pr.

(Question4 1=In the simultaneous tossing of two perfect coins, the probability of having atleast one head is,

5

B:

©.

Del

Correct Answer:- Option-C

Question42:For two events ८1 , 02 if P(E) =

J then സേം

7

ष.

3

ए.

Correct Answer:- तकण

Pay

(Question4 3:1f P(A/B)=- en

and P( B/A):

is equal to

3

ಕ

೧

न سام إن

றட

T 2

Correct Answer:- Option-A

Question 4=1f P(x) and Py (x) be the marginal probability functions of two independent discrete random variables X and Y, then their joint probability function P(x,y)=

Pua)

700

एः)

220)

10)

D:-None of these

Correct Answer:- Option-B

3

Question45:The function f(x) defined as f(x) ۲ ೫ 1.

isa possible!

JO சனங்க

Acdensity function

B-distribution function

वि

D:-none of these

Correct Answer: Option-A

(Question46:-For two random variables X and Y, the relation E(XY)=E(0E(Y) holds good

‘Acif X and Y are statistically independent.

Befor all X and ¥.

Cif X and ¥ are identical.

D:-none of these.

Correct Answer- Option-A

Question47Var(2X 8) if Var(X)=1 is

५5

83

८4

D:-none of these.

Correct Answer: Option-C

Question48-E(X— 4)” is minimum when

ايم

Bek>EQ)

೦೫00.

D:-none of these

Correct Answer: Option-C

Question49-The height of persons in a country is a random variable of the type

) variable

Be-discrete random variable

Coneither discrete nor continuous random variable

D:-continuow as well as discrete random variable

Correct Answer: Option-A

Question50=IFX is a random variable, E(e" ) is known as

‘A-characteristic function

B-moment generating function

probability generating function

D:-none of these

Correct Answer:- Option-B

Question 1=The mean and variance of a binomial distribution are 8 and 4 respectively. Then P(X=1) is equal to

5

05/25/2015 03:06 PM

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