Correct Answer:- Option-B

Question79:-Consider a queuing model M/M/1 with interarrival time A and service
time ‏آ یر‎ Which of the following statements is/are correct ?

(i) Steady state distribution of Queue length exist if A - ப

(ii) Steady state distribution of Queue length exist if A> u

(iii) Steady state distribution is given by Geometric distribution

A:-Only (i and iii)

B:-Only (ii and iii)

C:-Only (i)

D:-Only (iii)

Correct Answer:- Option-A

Question80:-Suppose N(t) is a renewal process generated by exponential random
variables ೫,, ೫, .. ., ೫, शांत parameter A and H(t) is a renewal function. Which of the
following statements is/are true ?
(i) N(t) is a Poisson process
(ii) Renewal function H(t) is sm
(iii) ‏ون‎ =0 if B(x)=00

A:-Only (i)

B:-Only (ii and iii)

C:-Only (ii)

D:-All of the above (i, ii and iii)

Correct Answer:- Option-D

Question81:-Consider the simple linear regression model y = 4 + 4 + « , Which of
the following is a wrong statement ?

A:-Mean of Y is a linear function in X

B:-Variance of Y depends on the value of X

C:-Response variables are uncorrelated

D:-The sum of the residuals in simple linear regression models is always zero
Correct Answer:-Question Cancelled

Question82:-Consider the simple linear regression model y = 6 + 4X + € , Which of
the following estimates are not unbiased ?

A:-Least square estimates of 4, and 6

B:-Maximum likelihood estimates of 4 and 4;

C:-Least square estimates of ०१

D:-Maximum likelihood estimates of 2

Correct Answer:- Option-D
Question83:-Consider the simple linear regression model y = 4, +4; X+ ಆ ೧೮೧೮ « '5
are uncorrelated with mean zero and variance «2, What is the value of ൫൧

‎वि‏ مہو
‎Se where Syy == (X;— X)?‏

‎சிப ‏سرک‎