اا ااه ااام 0482018

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Let X and Y are two independent Gamma variables. Then X/Y is distributed as
A) Gamma variate B) Beta variate of first kind

C) Beta variate of second kind D) Exponential
Let X, and X, be two random variables following the density f(x) = e~ X >0 then what
is the distribution of Z =X /X, ?

A) Exponential B) Gamma ர்‌ D) F

A symmetric die is thrown 600 times. The lower bound for the probability of getting

80 to 120 sixes is
A) 80/120 B) 19/24 C) 8/24 D) 6/12

The sampling error associated with a census study is

4) 0 B) 1% C) 2% D) 5%

Which type of expsrimental design does not use the principle of local control in
measuring variation among experimental units ?

A) RBD B) LSD C) CRD D) None of these

The number of treatments in a 2° factorial experiment is
A) 1 B) 4 C) 3 D) 8

If a sample is taken at random from a population, itis likely to posses almost the same
characteristics as that of the population. This principle is called

A) Probability sampling B) Law of inertia of large numbers

C) Non-probability sampling D) Law of statistical regularity

Let (X, X,, ಸ) is a random sample of size 3 taken from ‏لا‎ (1, 63) . 91
T, =X +X, +X3)/3 and T, =(X +2X,+ ‏كيف‎ be the estimators used to estimate ‏.نا‎
‎Which estimator is more efficient ?

AT, BT, C) T,andT, D) None