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ए: മില്ല २

Correct Answer:- Option-A
Question20:The mean of the distribution, in which the value of x are 1.2,...n, the frequency of each being unity is
‏للخم‎

e

©.

D: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 cbservations are replaced by correct values 8 and 4, then t

۸-5,
85
ரம
214.15
Correct Answer:- Option-A
Question3 1:-Sum of absolute deviations about median 15
बन्‌
Bugreatest
एव्म
D:-oqual
Correct Answer:- Option-A
Question32:1f each of a set of cbservations of a variable is multiplied by a constant (non-zero) value, the variance of the resultant variable
ಸಿ: unaltered
Beincreases
Cidecreases
घन unknown
Correct Answer:- Option-B
Question33:The standard deviation of a distribution is 5. The value of the fourth central moment uy in order that the distribution be mesokurtic should be
Avequal to 3
Bugreater than 1875
Croqual to 1875
Dxless than 1875
Correct Answer:- Option-C
Question34+In a frequency curve of scores the mode was found ‏ما‎ be higher than the mean. This shows that the distribution is
Arsymmetric
Benegatively skewed
Cupositively skewed
D:-normal
Correct Answer:- Option-B
Question35:The probability of drawing any one spade card from a pack of cards is
1

7

T
2
T
1

3
Correct Answer:- Option-D
Question36+A coin is tossed three times in succession, the number of sample points in sample space ‏کڈ‎
‎۸6
‎28
‎03
‎0:4
‎Correct Answer:- Option-B
Question37:A single letter is selected at random from the word ‘probability’. The probability that it is a vowel is

7
1

×ظ

©.
D:

Correct Answer:- OptionC
Question38:A number is chosen at random among the first 120 natural numbers. The probability of the number chosen being a multiple of 5 or 1515

1
=
1
5

भ ‏و‎

D:none of these
Correct Answer:- Option-A

லுக்கும்‌ வட ன்றன எ ‏0سصیییییییی۳ی۷ی ظ9‎

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Correct Answer:- Option-A

Question40:-An 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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