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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
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5

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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

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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

05/25/2015 03:06 PM