ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 304 - 307 of 461

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Question number: 304

» Probability » Probability Distributions » Lognormal

MCQ▾

Question

Which of the following properties is/are satisfied by the probability density function of the lognormal distribution with parameters and .

Choices

Choice (4) Response

a.

increases and then decreases with mode at

b.

is concave upward then downward then upward again, with inflection points at

c.

as and as

d.

All a. , b. and c. are correct

Question number: 305

» Probability » Probability Distributions » Joint and Marginal Distributions

MCQ▾

Question

If is the density function for the joint distribution of the continuous random variables and defined over the unit square bounded by the points and then the value of is ________.

Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

Question number: 306

» Probability » Probability Distributions » Random Vectors

MCQ▾

Question

The joint density function of two continuous random variables and is

What is the value of ?

Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

Question number: 307

» Probability » Modes of Convergences of Sequences of Random Variables » In Distribution

MCQ▾

Question

Consider a random permutation of the elements in the set . We say that s match occurs at position . If denotes the number of matches, then the distribution of converges to ________ as .

Choices

Choice (4) Response

a.

Exponential distribution with parameter 1

b.

Poisson distribution with parameter 1

c.

Laplace distribution with location parameter 0 and scale parameter 1

d.

None of the above

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