June 2015

1:

Which of the following relating to normal distribution are not correct?

(i) Co-efficient of skewness is three.

(ii) It is mesokurtic.

(iii) Mean deviation for it is 2/3σ.

(iv) µ ± 2σ covers 95.45% area.

(v) Mean, median and mode are equal.

(vi) The standard normal variate z has mean one and SD zero.

Codes:

A.

(i), (iii) and (vi)

B.

(iii), (iv) and (v)

C.

(i), (iii) and (v)

D.

(i), (iii) and (iv)

 

Answer : A

Explanation :

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Option: A

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