STA301 QUIZ NO 2 SOLVED SPRING 2019 FILE 3|| 100% VERIFIED|| VURANK

STA301 QUIZ NO 2 SOLVED 100% VERIFIED BY ADMIN (FINAL TERM SYLLABUS)

Q1: if f(x)= 1/10, x=10, then E(X) is:

A) 0

B) 1 (100% Sure)

C) -1

D) 6/8

Q2: The number of trials in hypergeometric distribution is:

A) Not fixed

B) Fixed (100% Sure)

C) Large

D) Small

Q3: A value of standard deviation is equal to 0, means

A) All the values in data are changing rapidly

B) All the values are constant (100% Sure)

C) Both above

D) None of the above

Q4: Match the binomial probability P(x> 0.5) with the correct statement.

A) P(there are at most 0.50 successes)

B) P(there are fewer than 0.50 successes)

C) P(there are more than 0.50 successes) (100% Sure)

D) P(there are at least 0.50 successes)

Q5: A random experiments has five outcomes in its sample space {s1, s2,s3,s4,s5}.
If P(s1)=0.2, P(s2)=0.3, P(s3)=0.1, P(s4)=0.2
then P(s5)=?

A) 1 (100% Sure)

B) 0.2

C) 0.8

D) 0.5

Q6: In hyper geometric distribution; N = number of units in thr population, n= number of units in the sample and k = number of successes in the population, then Variance of hyper geometric distribution is defined as:

A) n.k/N((N-k)/N)((N-n)/(N-1)) (100% Sure)

B) n.k/N((N-1)/N)((N-n)/(N-1))

C) n.k/N((N-k)/n)((N-n)/(N-1))

D) n.k/N((N-k)/N)((N-n)/(N-k))

Q7: What range of limit to be used for INTEGRATION of joint p.d.f to obtain its marginal pdf?

A) 0 to 1

B) -1 to 1

C) -∞ to +∞ (100% Sure)

D) 0 to +∞

Q8: Let X and Y be two independent random variables then E(XY)=

A) E(X)/E(Y)

B) E(X) E(Y) (100% Sure)

C) 1

D) 0

Q9: If total probability of joint probability distribution f(x,y) is ONE then what will be the total probability of its marginal pdf g(x)?

A) Half of the joint pdf

B) Less than one

C) Anywhere between zero and one

D) One (100% Sure)

Q10: The number of parameters in normal distribution is(are):

A) 1

B) 2 (100% Sure)

C) 3

D) 4