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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.

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Correct Answer:- Option-D

Question52A probability distribution in which mean is equal to variance is

‘A:Binomial

B-Gamma

C:Normal

D:-Poisson

Correct Answer:- Option-D

(Question53~-An experiment succeeds twice as often as it fails. The chance that in the next six trials, there shall be atleast four successes is

40

AT 2 9

489

ಶಿ) 9

38 9

ചം

9 €

7 2 9

Correct Answer:- Option-D

Question54=The skewness in a binomial distribution will be zero, if

५०

ए

cpeq

Correct Answer: Optin-D

Question55:The characteristic function of Poisson distribution is

سی

പ)

Denone ofthese

Correct Answer Option-¢

Question56:The coefficient of variation of Poisson distribution with mean 4 is

5

ष.

न)

De2

Correct Answer:- Option -B

(Question 7=1FX is a normal variate representing the income in Rs. per day with mean=50 and S.D=10. If the number of workers in a factory is 1200, then the number of workers having income mor

=0.3849 where 2 is a standard normal variate)

۸462

28

"8

D:-none of the above.

Correct Answer:- Option-C

QuestionS8-1FX ~ Exp(S), then the probability density function of X is

Be ಹಾಂಗ

< „३०

பளை مخ

1

ہے مت

Correct Answer:- Option-A

(Question59-"The distribution for which mode does not exist is

Avnormal

B:-tdistribution

C+continuous rectangular distribution

നം distribution

Correct Answer:- Option-C

Question60:-Assume that the height of students is distributed as Nu, 7). Out of a large number of students, 5 percent are above 72 inches and 10 percent are below 60 inches. The mean and S.D. 0

(oven i= ತ ३ ७ [लक

/

ಕ Asner Opin 3

Question6 1A box contains 12 items out of which 4 are defective. A person selects 6 items from the box. The expected number of defective items out of his selected items is

od

Denone ofthe above.

Caroct Aner Opin A

کمن sie nova vrato with moan 20 and variance Gt he probably that ies botwoon 12 and 32

Givenz:-10 ൨൭

107

۸2

80,1189.

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5 8 05/25/2015 03:06 4

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