Question17:-Which of the following measure of central tendency is not useful to find the central value when one of the
observation is zero ?

A:-Mean

B:-Median

C:-Mode

D:-Geometric mean
Correct Answer:- Option-D

Question18:-The variance of the test statistic of Mann-Whitney-Wilcoxon U test for compairing two samples of sizes *n_(1)"
and *n_(2)° will be

(0൧-72)
‏-تھ‎ 12

7172 (041+72) + 1
8:- 6

11112 0111112 + 1)
கே 12

7172 (01+72) + 1
D:- 12

Correct Answer:- Option-C

Question19:-Which of the following estimator is a biased estimator, but consistant based on n observations *x_(1)°, ௨02),
sor X(N)?

n

=.

8: ൫൨
லயா ण ` {> (1). (2), ..., 9 (0)) `
D:-Minimum of * {x_(1),x_(2), .... x_(n)}*
Correct Answer:-Question Cancelled
Question20:-The analysis of variance is used to test
A:-The equality of variances of several groups
B:-The equality of means of several groups
C:-The equality of both means and variances of several groups
D:-None of the above
Correct Answer:- Option-B
Question21:-If a sample of n observations are taken from a population having the density function *f(x)=(1)/(b-a), aA:-Minimum of the observations will be sufficient estimator for b
B:-Maximum of the observations will be sufficient estimator for a
C:-Both 1 and 2 are true
D:-Both 1 and 2 are false
Correct Answer:- Option-D
Question22:-The distribution function of a continuous random variable ೫ 15 given by

0 if x<0
7۲ 5
=), if x>0

The probability of X exceeding 1 will be

D:-None of these
Correct Answer:- Option-C