STA301 QUIZ NO 3 SOLVED SPRING 2019 FILE 1|| 100% VERIFIED|| VURANK

STA301 QUIZ NO 3 SOLVED 100% VERIFIED BY ADMIN (FINAL TERM SYLLABUS)

Q1: The probability of success changes from trial to trial, is the property of:

A) Binomial experiment

B) Hypergeometric experiment (100% Sure)

C) Both binomial & hypergeometric experiment

D) Poisson experiment

Q2: The number of telephone calls that pass through a switchboard ha a Poisson distribution with mean equal to two per minute. The probability that no telephone calls pass through the switch board in a minute is:

A) 0.2707

B) 0.0517

C) 0.0183 (100% Sure)

D) 0.1353

Q3: If X is s discrete random variable and f(x) is the probability of X, then the expected value of this random variable is equal to:

A) Σ[f(x)+x]

B) Σf(x+3)

C) Σxf(x) (100% Sure)

D) Σf(x)

Q4: In hyper geometric distribution formula, N=number of units in the population, n=number of units in the sample, and k is defined as:

A) number of failures in the sample

B) number of failure in population

C) number of successes in sample

D) number of successes in population (100% Sure)

Q5: If μ = 3.82 and S.D(X) = 1.2, then C.V(X) will be:

A) 20.482

B) 24.896

C) 31.412 (100% Sure)

D) 26.451

Q6: Suppose 'X' is equal to the number of heads, when you throw a coin three times, The possible values of X are:

A) 1,2,3

B) 0,1,2,3 (100% Sure)

C) 0,1,2,3,...

D) 1,2,3,...

Q7: If we have f(x) = 4x, 0≤x≤1, then f(x) is a:

A) Continuous random variable

B) Distribution function

C) Probability density function (100% Sure)

D) Probability Distribution

Q8: Density function of normal distribution attains its maximum value when the value of random variable X is:

A) X = Mean (100% Sure)

B) X = Standard Deviation

C) X = Variance

D) All above

Q9: Three unbaised coins are tossed. The sample space is: S = {TTT,TTH,THT,HTT,THH,HTH,HHH}. What is the probability of getting at most two heads?

A) 1/4

B) 3/1

C) 1/2 (100% Sure)

D) 7/8

Q10: From the following table, x 0 1 2 3 f(x) 0.26 0.49 0.22 0.02 E(2X+1) will be:

A) 2

B) 1.98

C) 2.98 (100% Sure)

D) 0.99