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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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D:-Antilog( 21> 8 92"

Correct Answer:- Option-A

Question29:The mean of the distribution, in which the value of x are 1,2,....n, the frequency of each being unity is

೫೫51)

5

©.

De-none of these

Correct Answer:- Option-C

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Question30:"The mean of 20 observations is 15. On checking it was found that two observations were wrongly copied as 3 and 6. If wrong observations are replaced by correct values 8 and 4, then t

۸-5,

285

വട

5:145

Correct Answer:- Option-A

Question3 1-Sum of absolute deviations about median is

கர்கள்

B:-greatest

एव्म

D-equal

Correct Answer:- Option-A

Question32-If each of a set of observations of a variable is multiplied by a constant (non-zero) value, the variance of the resultant variable

‘Avis unaltered

B:-increases

Crdecreases

D:-is unknown

Correct Answer:- Option-B

(Question33:The standard deviation of a distribution is 5. The value of the fourth central moment 14 in order that the distribution be mesokurtic should be

Avequal to 3

Be-greater than 1875

Ceequal to 1875

Deless than 1875

Correct Answer:- Option-C

Question34~In a frequency curve of scores the mode was found to be higher than the mean. This shows that the distribution is

Avsymmetric

Be-negatively skewed

Cepositively skewed

D:-normal

Correct Answer:- Option-B

(Question35:The probability of drawing any one spade card from a pack of cards is,

Correct Answer:- Option-D

Question36~A coin is tossed three times in succession, the number of sample points in sample space is

۸6

28

ces

Dea

Correct Answer:- Option -B

Question37~A single letter is selected at random from the word ‘probability’. The probability that it is a vowel is

3

Ack

1

B:

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D:

Correct Answer:- Option-C

(Question38A number is chosen at random among the first 120 natural numbers. The probability of the number chosen being a multiple of § or 15 is,

1

க்ஷ

1

ப

oT 6

D:-none of these

Correct Answer:- Option-A

Cnestons8-f and are wo indopendent events, th probably hat both ജി nother ftom acer i. the probably the مجعم of

ए.

Correct Answer:- Option-A

Question40An urn contains 9 balls, two of which are red, three blue and four black. Three balls are drawn at random. The chance that they are of the same colour is

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