## Kerala PSC Previous Years Question Paper & Answer

Title : STATISTICAL ASSISTANT GR II -ECONOMICS AND STATISTICS
Question Code : A

Page:4

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
Excerpt of Question Code: 005/2015/OL

4 of 8

7

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

5

B:

Del

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

J then സേം
7
ष.
3

ए.

Pay

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

and P( B/A):

is equal to

3

न ‏سام إن‎

றட
T 2

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

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
(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.
Question47Var(2X 8) if Var(X)=1 is
५5
83
८4
D:-none of these.
Question48-E(X— 4)” is minimum when
‏ايم‎
‎Bek>EQ)
‎೦೫00.
‎D:-none of these
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
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